exp+1

#include <stdio.h>
int main()
{
    printf("my stuno is: HD 188753 Ab \n");    
    printf("2020 cyberpunk， my world enter a new chapter！");
    
    return 0;
}

# include <stdio.h>
int main()
{
    while(1)
    printf("哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈嗝");
    
    return 0;
}

# include <stdio.h>
int main()
{
    while(0)
    printf("哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈哈嗝");
    
    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.其他...\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，不懂得，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.其他...\n");
     printf("你的选择：");
     scanf("%d",&answer);
     
     if (answer ==1)
        printf(":)\n");
        else if(answer ==2)
        printf("这样都不能解决问题啊，那我们选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 ;
}