#include<iostream>
#include<cstdio>
整数转换为字符串：

#include<cstring>
#include<algorithm>
#include<stdlib.h>
using namespace std;
int main()
{
    int num = 100;
    char str[25];
    sprintf(str,"%d",100);
    printf("%c %c %c",str[0],str[1],str[2]);
    return 0;
}

字符串