编写一个函数 比较三个字符串的大小

#include "stdafx.h"int main(int argc, char* argv[]){char *change(char a[],char b[],char c[]);char a[]="wang",b[]="zhan",c[]="zhi";puts(change(a,b,c));return 0;}char *change(char a[],char b[],char c[]){int i,su1=0,su2=0,su3=0;for(i=0;a[i];i++)su1+=a[i];for(i=0;b[i];i++)su2+=b[i];for(i=0;c[i];i++)su3+=c[i];if(su1>su2){if(su1>su3)return a;}else if(su2>su3){return b;}elsereturn c;}