【程序】
#include <stdio.h>
int main()
{
char s1[80],s2[40];
int i=0,j=0;
printf("\nInput the first string:");
scanf("%s",s1);
printf("\nInput the second string:");
scanf("%s",s2);
while (s1[i] !='\0')
______1______;
while (s2[j] !='\0')
______2______; /* 拼接字符到s1 */
s1[i] ='\0';
printf("\nNew string: %s",s1);
}
请补充