作业1 （实验1）

 

   //打印两个（行）个字符小人

#include<stdio.h>

int main()

{
    printf(" O   O\n");
    printf("<H> <H>\n");	
    printf("I I I I\n");

    return 0;

}

　

 

 

 

   //打印两个（列）字符小人

#include<stdio.h>

int main()

{
    printf(" O \n");
    printf("<H> \n");	
    printf("I I \n");

    printf(" O \n");
    printf("<H> \n");	
    printf("I I \n");

    return 0;

}

　　

 

 

#include<stdio.h>

int main()

{
	float x, y;
	float r1, r2, r3, r4;

	x = 1;
	y = 2;

	r1 = x + y;
	r2 = x - y;
	r3 = x * y;
	r4 = x / y;

        printf("r1 = %f\n",r1);
	printf("r2 = %f\n",r2);
	printf("r3 = %f\n",r3);	
        printf("r4 = %f\n",r4);

        return 0;

}

　　

 

 

 

#include<stdio.h>

int main()

{
	int n, r1, r2, r3, r4;
	n = 100;

	r1 = n*(n+1)/2;
	r2 = (n+1)*n/2;
	r3 = n/2*(n+1);
	r4 = (n+1)/2*n;

	printf("n = %d\n",n);
    printf("r1 = %d\n",r1);
	printf("r2 = %d\n",r2);
	printf("r3 = %d\n",r3);	
    printf("r4 = %d\n",r4);

    return 0;

}

　　

 

 

#include<stdio.h>

int main()

{
	int n, r1, r2, r3, r4;
	n = 101;

	r1 = n*(n+1)/2;
	r2 = (n+1)*n/2;
	r3 = n/2*(n+1);
	r4 = (n+1)/2*n;

	printf("n = %d\n",n);
    printf("r1 = %d\n",r1);
	printf("r2 = %d\n",r2);
	printf("r3 = %d\n",r3);	
    printf("r4 = %d\n",r4);

    return 0;

}

　　

 

 

#include <stdio.h> 
int main() 
{
    int answer;
    char words[5000];
    
    printf("网课学习让一些人欢喜一些人忧.\n");
    printf("1. 作为一个宅，社恐，觉得这样很好，有网络，自主学习，很ok.\n");
    printf("2.不喜，不喜，很不喜，眼睛快瞎了，脑壳有点卡...\n");
    printf("3.中间派，不知道，说不清.\n");
    printf("4.其它...\n");
    printf("你的选择: ");
    scanf("%d", &answer);
    if(answer == 4)
	{
        printf("请补充说明你的想法:\n");
        getchar();
        gets(words);
    }
    printf("\n");
    printf("当遇到问题时你会选择:\n");
    printf("1.遇到问题，就解决问题。不懂的，搜索式学习，逐个攻破.\n") ;
    printf("2.遇到问题，不高兴。然后，...，就没有了.\n");
    printf("3.其它...\n");
    printf("你的选择: ");
    scanf("%d", &answer);
    
    if(answer == 1)
       printf(":)\n");
    else if(answer == 2)
       printf("这样不能解决问题啊...我们选择1好不好:)\n");
    else if(answer == 3)
	{
        printf("请补充说明你的想法:\n");
        getchar();
        gets(words);
    }
       
    return 0;
}