C语言简单拼接两个字符串

#include<stdio.h>
int main(){
	char s1[80],s2[80];
	int i=0,j=0;
	printf("input string1:");
	scanf("%s",s1);
	printf("input string2:");
	scanf("%s",s2);
	while(s1[i]!='\0')
		i++;
	while(s2[j]!='\0')
	s1[i++]=s2[j++];
	s1[i]='\0';
	printf("\n The new string is:%s\n",s1);
	return 0;
}