实验1C语言开发环境使用和数据类型、运算符、表达式

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

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

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

#include <stdio.h> 
int main() {
    
    int x, y;
    int r1, r2, r3, r4;
    
    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;
}

#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;
}

收获：理论知识上在第一、二章了解了C语言的数据类型、常量，符号常量，自增自减，数据转换，运算符使用等；经过实验，增强了操作性并对其有了更加深刻的了解。
体会：未学之前如天书，不敢接近，稍有了解，畏惧削减，兴趣使然，虽未通透且记不全，路漫漫，努力ing……୧(๑•̀⌄•́๑)૭（感谢老师的负责与专业）