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("202083450035\n黑夜过后是暖阳");

ret

 

#include<stdio.h>
int main(){
    while(1)
        printf("明德格物，立己达人");

    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 answer;
    char words[5000];

    printf("在家上学让一些人欢喜一些人有忧.\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： \n");
    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;
}