题解 | 复制部分字符串

#include <iostream>
#include <string.h>
using namespace std;

int main(int argc, char const* argv[])
{
	char ch[100] = { 0 }, ch1[100] = { 0 };
	char* pc = ch;
	int len = 0, m = 0;
	
	while (1)
	{
		scanf("%s", ch);
		len = strlen(ch);
		if (len >= 1 && len < 30)break;
		printf("字符串长度在1~30\n");
	}
	
	scanf("%d", &m);

	int i = 0; pc += m-1;
	while (*(pc + i))
	{
		ch1[i] = *(pc +i);
		printf("%c", ch1[i]);
		i++;
	}
	return 0;
}