C程序设计语言 5-3

练习5-3 用指针方式实现第2章中的函数strcat。函数strcat(s, t)将t指向的字符串复制到s指向的字符串的尾部。 

#include <stdio.h>

int my_strcat(char *, char *);

int main()
{
	char s[20], t[10];

	printf("please input string s, while s has no more than 10 chars.\n");
	scanf("%s", s);
	printf("please input string t, while t has no more than 10 chars.\n");
	scanf("%s", t);
	my_strcat(s, t);
	printf("concatenated string:%s\n", s);

	return 1;
}

int my_strcat(char *s, char *t)
{
	//int i = 0, j = 0;

	while (*s++ != '\0')
		;
	s--;
	while ((*s++ = *t++) != '\0')
		;

	return 1;
}