Question

编程实现strcat函数的功能

用C语言作!

Answer 1

#include "stdio.h"

char* strcat(char s1[],char s2[])
{
int i,j;
for(i=0;s1[i]!=0;i++)
;
for(j=0;s2[j]!=0;i++,j++)
s1[i]=s2[j];

s1[i]=0;
return s1;
}
int main()
{
char s1[100]="abc",*s;
s=strcat(s1,"def");
printf("%s",s);
return 0;
}