Hello World C ++错误-cmath

Question

I am a complete beginner to C++. I am using microsoft visual studio 2015 with fltk 1.3.x and am following "Programming Principles and Practice Using C++" by Bjarne Stroustrup. The current program I am working on is Hello World, the drill on p52-54.

The code I have written(/copied from the book and a supporting doc for std_lib_facilities.h [www.stroustrup.com/Programming/include-std_lib_facilities.doc]) is:

//My first hello world program
#include "../../../std_lib_facilities.h"
int main()  //C++ programs start by executing the function main
{
    cout << "Hello, World!/n";  //output "Hello, world!"
    keep_window_open();         //wait for a character to be entered
    return 0;
}

Then I go Build -> Compile and this happens...

Severity    Code    Description Project File    Line
Error (active)      the global scope has no "acosf" Hello_World c:\Program      Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath   670
Error (active)      the global scope has no "asinf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    670
Error (active)      the global scope has no "atanf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    671
Error (active)      the global scope has no "atan2f"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    671
Error (active)      the global scope has no "ceilf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    671
Error (active)      the global scope has no "cosf"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    672
Error (active)      the global scope has no "coshf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    672
Error (active)      the global scope has no "expf"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    672
Error (active)      the global scope has no "fabsf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    673
Error (active)      the global scope has no "floorf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    673
Error (active)      the global scope has no "fmodf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    673
Error (active)      the global scope has no "frexpf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    674
Error (active)      the global scope has no "ldexpf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    674
Error (active)      the global scope has no "logf"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    674
Error (active)      the global scope has no "log10f"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    675
Error (active)      the global scope has no "modff" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    675
Error (active)      the global scope has no "powf"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    675
Error (active)      the global scope has no "sinf"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    676
Error (active)      the global scope has no "sinhf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    676
Error (active)      the global scope has no "sqrtf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    676
Error (active)      the global scope has no "tanf"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    677
Error (active)      the global scope has no "tanhf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    677
Error (active)      the global scope has no "acosl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    679
Error (active)      the global scope has no "asinl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    679
Error (active)      the global scope has no "atanl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    680
Error (active)      the global scope has no "atan2l"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    680
Error (active)      the global scope has no "ceill" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    680
Error (active)      the global scope has no "cosl"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    681
Error (active)      the global scope has no "coshl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    681
Error (active)      the global scope has no "expl"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    681
Error (active)      the global scope has no "fabsl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    682
Error (active)      the global scope has no "floorl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    682
Error (active)      the global scope has no "fmodl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    682
Error (active)      the global scope has no "frexpl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    683
Error (active)      the global scope has no "ldexpl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    683
Error (active)      the global scope has no "logl"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    683
Error (active)      the global scope has no "log10l"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    684
Error (active)      the global scope has no "modfl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    684
Error (active)      the global scope has no "powl"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    684
Error (active)      the global scope has no "sinl"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    685
Error (active)      the global scope has no "sinhl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    685
Error (active)      the global scope has no "sqrtl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    685
Error (active)      the global scope has no "tanl"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    686
Error (active)      the global scope has no "tanhl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    686
Error (active)      the global scope has no "float_t"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    688
Error (active)      the global scope has no "double_t"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    688
Error (active)      the global scope has no "nan"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    700
Error (active)      the global scope has no "acoshf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    704
Error (active)      the global scope has no "asinhf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    704
Error (active)      the global scope has no "atanhf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    704
Error (active)      the global scope has no "cbrtf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    705
Error (active)      the global scope has no "erff"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    705
Error (active)      the global scope has no "erfcf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    705
Error (active)      the global scope has no "expm1f"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    706
Error (active)      the global scope has no "exp2f" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    706
Error (active)      the global scope has no "hypotf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    707
Error (active)      the global scope has no "ilogbf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    707
Error (active)      the global scope has no "lgammaf"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    707
Error (active)      the global scope has no "log1pf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    708
Error (active)      the global scope has no "log2f" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    708
Error (active)      the global scope has no "logbf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    708
Error (active)      the global scope has no "llrintf"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    709
Error (active)      the global scope has no "lrintf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    709
Error (active)      the global scope has no "nearbyintf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    709
Error (active)      the global scope has no "rintf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    710
Error (active)      the global scope has no "llroundf"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    710
Error (active)      the global scope has no "lroundf"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    710
Error (active)      the global scope has no "fdimf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    711
Error (active)      the global scope has no "fmaf"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    711
Error (active)      the global scope has no "fmaxf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    711
Error (active)      the global scope has no "fminf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    711
Error (active)      the global scope has no "roundf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    712
Error (active)      the global scope has no "truncf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    712
Error (active)      the global scope has no "remainderf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    713
Error (active)      the global scope has no "remquof"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    713
Error (active)      the global scope has no "copysignf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    714
Error (active)      the global scope has no "nanf"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    714
Error (active)      the global scope has no "nextafterf"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    715
Error (active)      the global scope has no "scalbnf"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    715
Error (active)      the global scope has no "scalblnf"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    715
Error (active)      the global scope has no "nexttowardf"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    716
Error (active)      the global scope has no "tgammaf"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    716
Error (active)      the global scope has no "acoshl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    718
Error (active)      the global scope has no "asinhl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    718
Error (active)      the global scope has no "atanhl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    718
Error (active)      the global scope has no "cbrtl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    719
Error (active)      the global scope has no "erfl"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    719
Error (active)      the global scope has no "erfcl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    719
Error (active)      the global scope has no "expm1l"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    720
Error (active)      the global scope has no "exp2l" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    720
Error (active)      the global scope has no "hypotl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    721
Error (active)      the global scope has no "ilogbl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    721
Error (active)      the global scope has no "lgammal"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    721
Error (active)      the global scope has no "log1pl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    722
Error (active)      the global scope has no "log2l" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    722
Error (active)      the global scope has no "logbl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    722
Error (active)      the global scope has no "llrintl"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    723
Error (active)      the global scope has no "lrintl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    723
Error (active)      the global scope has no "nearbyintl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    723
Error (active)      the global scope has no "rintl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    724
Error (active)      the global scope has no "llroundl"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    724
Error (active)      the global scope has no "lroundl"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    724
Error (active)      the global scope has no "fdiml" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    725
Error (active)      the global scope has no "fmal"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    725
Error (active)      the global scope has no "fmaxl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    725
Error (active)      the global scope has no "fminl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    725
Error (active)      the global scope has no "roundl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    726
Error (active)      the global scope has no "truncl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    726
Error (active)      the global scope has no "remainderl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    727
Error (active)      the global scope has no "remquol"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    727
Error (active)      the global scope has no "copysignl" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    728
Error (active)      the global scope has no "nanl"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    728
Error (active)      the global scope has no "nextafterl"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    729
Error (active)      the global scope has no "scalbnl"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    729
Error (active)      the global scope has no "scalblnl"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    729
Error (active)      the global scope has no "nexttowardl"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    730
Error (active)      the global scope has no "tgammal"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    730
Error (active)      the global scope has no "fpclassify"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    732
Error (active)      the global scope has no "signbit"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    732
Error (active)      the global scope has no "isfinite"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    733
Error (active)      the global scope has no "isinf" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    733
Error (active)      the global scope has no "isnan" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    734
Error (active)      the global scope has no "isnormal"  Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    734
Error (active)      the global scope has no "isgreater" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    735
Error (active)      the global scope has no "isgreaterequal"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    735
Error (active)      the global scope has no "isless"    Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    736
Error (active)      the global scope has no "islessequal"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    736
Error (active)      the global scope has no "islessgreater" Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    737
Error (active)      the global scope has no "isunordered"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\cmath    737
Error (active)      cannot open source file "/usr/include/math.h"   Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\math.h   22
Error   C1083   Cannot open include file: '/usr/include/math.h': No such file or directory  Hello_World c:\program files (x86)\microsoft visual studio 14.0\vc\include\math.h   22
Error (active)      linkage specification is incompatible with previous "copysign" (declared at line 53 of "c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\math.h") Hello_World c:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\xtgmath.h    183
Error (active)      linkage specification is incompatible with previous "rint"     (declared at line 52 of "c:\Program Files (x86)\Microsoft Visual Studio     14.0\VC\include\math.h") Hello_World c:\Program Files (x86)\Microsoft Visual     Studio 14.0\VC\include\xtgmath.h    207

I am thinking that this relates to the std_lib_facilities.h file. The book recommends use of fltk 1.1.x and visual studio 2005 so maybe this is also part of the problem?

Any insight you can give is greatly appreciated.

Thank you.

Answer 1

that should work

#include <iostream>

int main()

{

    std::cout << "Hello, World!" << std::endl;   //endl = /n

    system("pause")      //system pause = wait till user entering a char

    return 0;

}

Answer 2

Im pretty new too but heres how I did it using visual studio:

---

// my first program in c++

#include <iostream>

using namespace std;

int main()

{

cout <<"Hello World! I am a c++ program.";

    return 0;
}

---

Basically all you need is to use the #include < iostream > That will tell the computer to use those functions in order to carry out the program (take out the spaces). You also need to include: using namespace std; if you want to say "cout". Otherwise you have to specify and say std before cout. Lastly you can just take out the "keep window open thing". You dont need that as long as you just click CTRL-F5 to run the program. Hope that Helped! Goodluck!