实验一

//

#
include<studio.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;
}

 

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",r2);
    printf("r2=%d\n",r2);
    printf("r3=%d\n",r3);
    printf("r4=%d\n",r4);
    
    return 0;
}

 

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",r2);
    printf("r2=%d\n",r2);
    printf("r3=%d\n",r3);
    printf("r4=%d\n",r4);
    
    return 0;
}

 

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