//打印一个字符小人

#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; 
}

//打印一个字符小人

#include <stdio.h>
int main() {
    printf(" o      o\n");
    printf("<H>    <H>\n");
    printf("I I    I I\n");
    
    return 0; 
} 

/* 用C语言实现一个简单的算术运算程序 */
#include <stdio.h>
int main() {
    
    int x, y;                   //定义两个整型变量，用来保存运算数据
    int r1, r2, r3, r4;         //定义四个整型变量，用来保存加减乘除运算结果
    
    x = 1;
    y = 2;
    
    r1 = x + y;
    r2 = x - y;
    r3 = x * y;
    r4 = x / y;
    
    printf("r1 = %d\n", r1);
    printf("r2 = %d\n", r2);
    printf("r3 = %d\n", r3);
    printf("r4 = %d\n", r4);
    
    return 0;
}

/* 用C语言实现一个简单的算术运算程序 */
#include <stdio.h>
int main() {
    
    float x, y;                   //定义两个整型变量，用来保存运算数据
    float r1, r2, r3, r4;         //定义四个整型变量，用来保存加减乘除运算结果
    
    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，...，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;
}

#include <stdio.h>
int main() {
    int answer;
    char words[5000];
    
    printf("现在的天气让人感觉很头疼.\n");
    printf("1. 作为一个南方人觉得这样很好。湿润，温和，很ok.\n");
    printf("2. 不喜，不喜，很不喜潮湿。北方人向往干燥...\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("当突然降温时，你会选择：\n");
    printf("1. 小问题，不用穿很厚.\n");
    printf("2. 翻出衣柜里的毛衣和秋裤.\n");
    printf("3. 其它...\n");
    printf("你的选择：  ");
    scanf("%d", &answer);
    
    if(answer == 1)
        printf("真真真硬汉:)\n");
    else if(answer == 2)
        printf(":)\n");
    else if(answer == 3) {
        printf("请补充说明你的想法: \n");
        getchar();
        gets(words);
    }
    
    return 0;
}