模拟实现strcat

程序代码:

#include<stdio.h>  
#include<stdlib.h>
#include<assert.h>
#include<string.h>
//模拟实现strcat
void *mystrcat(char *arr, char *brr) {
	char *ret = arr;
	assert(arr != NULL);
	assert(brr != NULL);
	while (*arr != '\0') {
		arr++;
	}
	while (*brr != '\0') {
	*arr++ = *brr++;
	}
	return ret;
}
int main()
{
	char arr[50] = "shan xi ke";
	char brr[15] = "ji da xue";
	char *ret = mystrcat(arr, brr);
	printf("%s\n", ret);//打印拼接后的字符串
	printf("%d", strlen(ret));//打印字符串长度
	system("pause");
	return 0;
}