Cygwin“使用：找不到命令”用于C ++程序

Question

Hoping to free myself from Eclipse and not wanting to keep using the online cpp.sh, I wrote a small program in Cygwin in nano and tried to run it. The code is included for clarity.

#include <iostream>
#include <string>

using namespace std;

int main()
{
  int i;
  string mystr;

  cout << "Enter number: ";
  cin >> i;
  cout << "You entered: " << i;
  cout << " and its double: << i*2 << ".\n";
  cin.ignore();
  cout << "Name: ";
  getline(cin, mystr);
  cout << "Hello " << mystr << ".\n";
  cout << "Team? ";
  getline(cin, mystr);
  cout << "Go " << mystr << "! \n";
  return 0;
}

Trying to run it returns a series of errors, as seen in the picture . Right now, I'm trying to understand why "using" is not recognized. Checking Google found many similar complaints, but never about the command "using," probably because "using" is a common enough word to be using in a different context.

Answer 1

You can't run source code directly. You must compile it first.

Answer 2

Well, a lot of g++ compile errors are because you have

cout << " and its double: << i*2 << ".\n";

when you probably meant

cout << " and its double: " << i*2 << ".\n";

with one more quotation mark

Answer 3

As soon as you insert the " into line 14 it will compile and run, but the last portion will not complete.

I would also create another string near mystr, and use it for getline() . Reusing mystr faults when I compile it. int main() { int i; string mystr; string team;

`getline(cin, team);
cout << "Go " << team << "! \n";`

After changing and compiling, I get: Enter number: 3 You entered: 3 and its double: 6. Name: Aaron Hello Aaron. Team? Meow Go Meow! Enter number: 3 You entered: 3 and its double: 6. Name: Aaron Hello Aaron. Team? Meow Go Meow!