task1

#include <stdio.h>

int main()
{
    printf(" O    O\n");
    printf("<H>  <H>\n");
    printf("I I  I I\n");
    

    return 0;
}

 

#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;
}

 

task2

#include <stdio.h>
#include <math.h>

int main()

{
    double x , ans ;
    
while(scanf("%lf", &x) !=EOF)
    {
    ans = pow(x,365);
    printf("%.2f的365次方:%.2f\n" , x , ans);
    printf("\n");

    }
    return 0;
    
        
}

#include<stdio.h>
#include<math.h>

int main()
{
    float F, C;

    while (scanf_s("%f", &C)!= EOF)
    {
        
        F = 9*C/5+32;
        printf("摄氏度c=%.2f时,华氏度f=%.2f", C, F);
        printf("\n");

    }
    return 0;
}

 

task3

#include<stdio.h>
#include<math.h>

int main()
{
     unsigned int sum;
    int n,a1, q;
    scanf_s("%d", &n);
    a1 = 1;
    q = 2;
    sum = a1*(1 - pow(q,n) )/ (1 - q);
    
    printf("n=:%d,sun=%u\n", n, sum);

    return 0;
}

不能,n取64时,计算结果数据过大,超出无符号整形的范围

task4

#pragma warning(disable:4996)
#include<stdio.h>

int main()
{
    double x, y;
    char c1, c2, c3;
    int a1, a2, a3;
    scanf("%d%d%d", &a1, &a2, &a3);
    printf("%d,%d,%d\n", a1, a2, a3);

    scanf("%c%c%c", &c1, &c2, &c3);
    printf("%c%c%c\n", c1, c2, c3);

    scanf("%lf%lf", &x, &y);
    printf("%.1f,%.1f\n", x, y);

    return 0;
}

 

task5

#pragma warning(disable:4996)
#include<stdio.h>

int main()
{
    int age1, age2;
    char gender1, gender2;

    scanf("%d%c%d%c", &age1, &gender1, &age2, &gender2);
    printf("age1=%d,gender1=%c\n", age1, gender1);
    printf("age2=%d,gender2=%c\n", age2, gender2);

    return 0;
}

 

task6

#include<stdio.h>
int main()
{
    
    char ans1, ans2;
    printf("每次课前认真预习,课后认真复习了没?(输入y或Y表示有,输入n或N表示没有):");
    ans1 = getchar();
    getchar();
    printf("手动敲代码实践了没?(输入y或Y表示敲了,输入n或N表示木有敲):");
    ans2 = getchar();
    if ((ans1 == 'y' && ans2 == 'y') || (ans1 == 'Y' && ans2 == 'Y'))
        printf("\n罗马不是一天建成的,继续保持哦:)\n");
    else
        printf("\n罗马不是一天毁灭的,我们来建设吧\n");
    return 0;
}

 

task7

#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.作为喜欢自学且自律的人,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_s("%d", &answer);

    if (answer == 4)
    {
        printf("请补充说明你的想法:\n");
        getchar();
        gets(words);
    }
    printf("\n");
    printf("当遇到困难时,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:\n");
    scanf_s("%d", &answer);

    if (answer == 1)
        printf(":)\n");
    else if (answer == 2)
        printf("这样不能解决啊,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;
}