实验1

实验任务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;
}

#include<stdio.h>
int main()
{
    printf(" O \t");
    printf(" O \n");

    printf("<H>\t");
    printf("<H>\n");

    printf("I I\t");
    printf("I I\n");

    return 0;
}

 

实验任务2

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>

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

    scanf("%lf%lf%lf",&a,&b,&c);
    
    if (a < b + c && b < a + c && c < a + b)
        printf("能构成三角形\n");
    else
        printf("不能构成三角形\n");

    return 0;
}

 

实验任务3

#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;
}

回答问题：加上这行getchar()就能读取掉换行符，保证后续输入正常

实验任务4

#define _CRT_SECURE_NO_WARNINGS 
#include<stdio.h>
int main()
{
    double x, y;
    char c1, c2, c3;
    int a1, a2, a3;

    scanf("%d%d%d", &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);//scanf("%f,%lf", &x, &y);
    printf("x = %f, y = %lf\n", x, y);
    return 0;
}

 

实验任务5

#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

int main()
{
    int year;

    year = (1e+9) / 3600 / 24 / 365+0.5;
    printf("10亿秒约等于%d年\n", year);

    return 0;
}

 

实验任务6

#define  _CRT_SECURE_NO_WARNINGS
#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);
    }

    return 0;
}

 

实验任务7

#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

int main()
{
    double c, f;

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

    return 0;
}

 

实验任务8

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

int main()
{
    int a, b, c;
    double s, area;
    
    while (scanf("%d%d%d", &a, &b, &c) != EOF)
    {
        s = (double)(a + b + c) / 2;
        area = sqrt(s * (s - a) * (s - b) * (s - c));

        printf("a=%d,b=%d,c=%d,area=%.3lf\n", a, b, c, area);
    }

    return 0;

}