实验一

test1.1

#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;
}

test1.2

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

}

test2

#include<stdio.h>
int main()
{
    float a, b, c;
    scanf_s("%f%f%f", &a, &b, &c);
    if (a + b > c&& b + c > a&& a + c > b)
        printf("能构成三角形");
    else
        printf("不能构成三角形");
    return 0;
}

test3

#include<stdio.h>
int main()
{
    char ans1, ans2;
    printf("预习了没");
    ans1 = getchar();
    getchar();
    printf("\n实践了没");
    ans2 = getchar();
    if (ans1 == 'y' || 'Y' && ans2 == 'y' || 'Y')
        printf("good");
        else
        printf("666");
    return 0;
}

test4

#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 = %lf, y = %lf\n", x, y);

    return 0;
}

test5

#include <stdio.h>
int main()
{
    int year;
    int sec;
    scanf_s("%d", &sec);
    year = sec / (60*60*24*365);
    if(sec % (60 * 60 * 24 * 365)>=(30*60*24*365))
    {
        year += 1;
    }
    printf("10亿秒约等于%d年\n", year);
    return 0;
}

test6.1

#include <stdio.h>
#include <math.h>
int main()
{
    double x, ans;
    scanf_s("%lf", &x);
    ans = pow(x, 365);
    printf("%.2f的365次方: %.2f\n", x, ans);
    return 0;
}

test6.2

#include <stdio.h>
#include <math.h>
int main()
{
    double x, ans;
    while (scanf_s("%lf", &x) != EOF)
    {
        ans = pow(x, 365);
        printf("%.2f的365次方: %.2f\n", x, ans);
        printf("\n");
    }
    return 0;
}

test7

#include<stdio.h>
int main()
{
    double f;
    double c;
    while (scanf_s("%lf", &c) != EOF)
    {
        f = 9 * c / 5 + 32;
        printf("摄氏度c=%.2f时，华氏度f=%.2f", c, f);
    }
    return 0;
}

test8

#include<stdio.h>
#include<math.h>
int main()
{
    double a, b, c, s,area;
    while (scanf_s("%lf%lf%lf", &a, &b, &c) != EOF)
    {
        s = (a + b + c) / 2;
        area = sqrt(s * (s - a) * (s - b) * (s - c));
        printf("a =%.0f,b=%.0f,c=%.0f,area=%.3f", a, b, c,area);

    }
    return 0;
}