\r\n

 

#define _CRT_SECURE_NO_WARNINGS
#include<stdlib.h>
#include<stdio.h>
int main(void)
{
    printf("first\n");
    printf("second\r");
    printf("third\n");
    printf("fourth\n\r");
    printf("fifth\r\n");
    printf("sixth\r\r");
    printf("seventh\n\n");

    system("pause");
    return 0;
}

今天才意思到有一个 /r

哈哈哈