实验一

实验一

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;
}

task2.c

#include<stdio.h>
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");
        
    return 0;
}

task3.c

#include <stdio.h>
int main()
{
char ans1, ans2; // 用于保存用户输入的答案
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(); // 从键盘输入一个字符，赋值给ans1
getchar(); // 思考这里为什么要加这一行。试着去掉这一行，看看对运行有没有影响。
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',ans2=='y'||ans1=='y',ans2=='Y') // 待补足，判断用户回答ans1和ans2都是小写y或大写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 = %lf, y = %lf\n",x, y);
return 0;
}

 

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

task5.c

#include <stdio.h>
#include <stdlib.h>
int main()
{
double year;
double num = 1000000000;
    year = num/(3600*24*365);
    if (year-int(year) < 0.5)
    printf("10亿秒约等于%d年\n", int(year));
    else{
    printf("10亿秒约等于%d年\n", int(year + 1)); 
}
return 0;
}

test6.1.c

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

test6.2.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;
}

text7.c

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

test8.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 = ((double)a+(double)b+(double)c)/2;
        area = sqrt(s*(s-a)*(s-b)*(s-c));
        printf("a = %d b = %d c = %d area = %.3lf ",a,b,c,area);
    }
    return 0;
}