字符指针作为参数传递给字符串

Question

Hi I am new to C++ and I require some input for the following problem:

In my header file (MyClass.h) a function is defined as:

bool Function(char *InString,char *outStr);

This has been implemented in "MyClass.cpp" like this:

bool MyClass::Function(char *InString,char *OutString=0) {
  std::string str = ***** I require the InString to be converted to String and assigned to str.
}

In my main function of console I used the following function:

#include "MyClass.h"
int _tmain(int argc, _TCHAR* argv[]) {
  char inp[50];
  char output[50];
  memset(output,0,sizeof(output));//Intialized
  std::cin>>inp;
  MyClass x;
  bool m = x.Function(inp,output);
}

Any help is deeply appreciated.

Answer 1

By

str.assign(InString);

you can assign a char to a std::string .

Answer 2

You can just assingn the character pointer to the string. As long as the data pointed to by the character pointer is null terminated, the copy will work as expected.

std::string str = InString;

Answer 3

Just std::string str = InString; should work.

Answer 4

well std::string has a constructor for this:

const char *s = "\nHello, World!";
std::string str(s);
cout<<str;

char *s2 = "\nHello, World!";
std::string str2(s2);
cout<<str2;

gives me:

Hello, World!

Hello, World!