Question

I have a C++ Program:

#include <iostream>
using namespace std;
int main (){
    char x [10] = "abc";
    system (sprintf ("mkdir ", "%s", x));    //error happens here, can't 
                                             //convert int to const char*
    return 0;
}

results in:

sys.c:8:37: error: invalid conversion from ‘int’ to ‘const char*’

Where am I converting an int to a char?

Answer 1

system expects a const char * as input, whereas sprintf returns an int. This is the problem which is leading your error. Also, the first argument of sprintf must be a writable buffer of sufficient size.