实验1 C语言输入输出和简单程序编写

1. 实验任务1

task1_1.c

#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;
}

task1_2.c

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

2. 实验任务2

task2.c

#include<stdio.h> 

int main()
{
    double a, b, c;
    
    scanf("%lf%lf%lf", &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");
    
    return 0;
}

3. 实验任务3

task3.c

#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;
}

问题回答：删除line9后，输入第一个“Y”或“N”后按回车，会跳过第二个问题，因为回车也是符号，会被判定为第二个问题的答案

4. 实验任务4

task4.c

#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 = %lf\n",x, y);
    
    return 0;
}

5. 实验任务5

task5.c

#include<stdio.h> 

int main()
{
    int year;
    
    year=round(pow(10,9)/(3.15*pow(10,7)));
    
    printf("10亿秒约等于%d年\n", year);
    return 0;
}

6. 实验任务6

task6_2.c

#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;
}

7. 实验任务7

task7.c

#include<stdio.h> 
#include<math.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);
        printf("\n");
    }
        
    return 0;
}

8. 实验任务8

task8.c

#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 = (a + b + c)/2.0;
        area = sqrt(s*(s - a)*(s - b)*(s - c));
        printf("a = %d, b = %d, c = %d, area = %.3f\n", a, b, c, area);
        printf("\n");
    }
        
    return 0;
}