实验1

#include <stdio.h>

void Human()
{printf(" o\n");
 printf("<H>\n");
 printf("I I\n");
 } 
 
 int main()
 {
    int line = 0,i = 0;
    printf("需要几行？\n");
    scanf("%d",&line);
    
    while(i < line + 1)
    {
    Human(); i++;
    }
    return 0;

 

}

 

#include <stdio.h>
#include <stdlib.h>


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

else
        {printf("不能构成三角形\n");}

return 0;
    
}

#include <stdio.h>
#include <stdlib.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();//防止if后语句和第二个问题一起出现 
    
    printf("\n动手敲代码实践了没? : ");
    ans2 = getchar();
    
    if ((ans1 == 'y' || ans1 == 'Y') && (ans2 == 'y' || ans2 == 'Y'))
        printf("罗马不是一天建成的, 继续保持哦:)\n");
    else
        printf("回去卖红薯吧！\n");
        
    return 0;

}

#include <stdio.h>
#include <stdlib.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;
}

 

 

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int year;
    double  sec = 1e10;
    
    year = sec/60/60/24/365;
    
    if(year%10 > 4)
        year = (year+10)/10;
    
    printf("10亿秒约等于%d年\n", year);
    
    return 0;
}

 

#include <stdio.h>
#include <stdlib.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;
}

 

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

int main()
{
    int a,b,c;double area,s;
    
    while(scanf("%d%d%d", &a,&b,&c) != EOF)
    {
        s = (a+b+c)/2;
        area = pow(s*(s-a)*(s-b)*(s-c),0.5);
        printf("a = %d，b = %d，c = %d，area = %.3lf",a,b,c,area);
        printf("\n");
    }
    return 0;
}