错误:从“int”转换为“const char*”无效。

I have a C++ Program:

我有一个c++程序:

#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;
}
#include <