c语言模拟字符串拼接

include 
include 
using namespace std;
void my_strcat(char *p,char *q) {
	while (*p) {   //找到
		p++;
	}
	*p = *q;       //移动第一个值
	while (*p) {   //开始循环赋值，先赋值后判断。
		q++;
		p++;
		*p = *q;
	}
	return;
}
int main() {
	char arr[20] = "world";
	char arr1[12] = "hello";
	char arr2[] = { 'a','b','c',''};
	my_strcat(arr1, arr);
	char* pp = arr1;
	while (*pp) {
		cout << *pp;
		pp++;
	}
	return 0;
}