连接两个字符串

#include<stdio.h>#include<string.h>int main(){int i=0;int j=0;char s1[80];char s2[80];printf("input s1 :\n");scanf("%s",s1);printf("input s2 :\n");scanf("%s",s2);while(s1[i]!='\0'){s1[i]=s1[i];i++;}while(s2[j]!='\0'){ s1[i+j]=s2[j]; j++;}s1[i+j]='\0';printf("%s\n",s1);return 0;}