实验1

#include<stdio.h>
#include<stdlib.h>
int main()
{
    printf(" o       o\n");
    printf("<H>     <H>\n");
    printf("I I     I I\n");
    
    system("pause");

    return 0;
}

 

 

int main()
{
    float a,b,c;
    scanf("%f%f%f", &a, &b, &c);
    if(a+b>c&&a+c>b&&b+c>a)
       printf("能构成三角形\n");
    else
       printf("不能构成三角形\n");
       getchar();
    system("pause");
    return 0;
}

#include <stdio.h>

int main() {
    char ans1, ans2; 

    printf("每次课前认真预习、课后及时复习了没?(输入y或Y表示有，输入n或N表示没有): ");
    ans1 = getchar(); 
    getchar(); 

    printf("\n动手敲代码实践了没?(输入y或Y表示敲了，输入n或N表示木有敲): ");
    ans2 = getchar(); 

    if ((ans1 == 'y' || ans1 == 'Y') && (ans2 == '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;
}

#include <stdio.h>

int main() {
    double x, y;
    char c1, c2, c3;
    int a1, a2, a3;

    scanf("%d%d%d", &a1, &a2, &a3);
    printf("a1 = %d, a2 = %d, a3 = %d\n", a1, a2, a3);

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

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

    return 0;
}

#include <stdio.h>

int main() {
    int year;
    long long seconds = 1000000000;

    year = seconds / (365 * 24 * 60 * 60);
    if (seconds % (365 * 24 * 60 * 60) > 0) { 
        year += 1;
    }

    printf("10亿秒约等于%d年\n", year);

    return 0;
}

#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>

int main() {
    double C, F;

    while (1) {
        printf("请输入摄氏度温度C：");
        if (scanf("%lf", &C) != 1) {
            printf("输入错误，程序退出\n");
            break;
        }

        F = 9.0 / 5.0 * C + 32;
        printf("摄氏度温度 %.2f 对应的华氏度温度为 %.2f\n\n", C, F);
    }

    return 0;

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

int main() {
    double a, b, c;
    double s, area;

    while (1) {
        printf("请输入三角形的三条边长：");
        if (scanf("%lf %lf %lf", &a, &b, &c) != 3) {
            printf("输入错误，程序退出\n");
            break;
        }

        s = (a + b + c) / 2;
        area = sqrt(s * (s - a) * (s - b) * (s - c));
        printf("三角形的面积为 %.3f\n\n", area);
    }

   return 0;
}