C语言实现strcat

#include <stdio.h>

char *MyStrcat(char *dest,char *src)

{

    char *t = dest;

    while(*dest)

    {

        dest++;

    }

    while(*dest++ = *src++)

        ;

    return t;

}

int main(void)

{

    char s1[] = "abc";

    char s2[] = "def";

    MyStrcat(s1,s2);

    printf("%s",s1);

}