实验二

任务一

问题一：生成R1到R2的随机数

问题二：生成随机学号

任务二

#include<stdio.h>
int main()
{
double x, y;
char c1, c2, c3;
int a1, a2, a3;
scanf("%d %d %d",&a1,&a2,&a3);
getchar(); 
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;
}

　　

 

 任务三

#include <stdio.h>
#include <math.h>
int main()
{
double x, ans;
scanf("%lf", &x);
for(;;)
{

ans = pow(x, 365);
printf("%.2f的365次方: %.2f\n", x, ans);
scanf("%lf",&x);
}
return 0;
}

　　

#include <stdio.h>
#include <math.h>
int main()
{
double c, f;
scanf("%lf", &c);
for(;;)
{

f = 9*c/5+32;
printf("摄氏度c=%lf时，华氏度f=%.2f\n", c, f);
scanf("%lf",&c);
}
return 0;
}

　　

 

 任务四

 

#include<stdio.h>

int main()
{
    char x;
    x=getchar();
    for(;x!=EOF;x=getchar())
    {
    
    getchar();
     if(x=='y') 
	 printf("wait\n");
     else if(x=='r') 
	 printf("stop\n");
     else if(x=='g') 
	 printf("go\n");
     else printf("wrong\n");
	 
    }
    return 0;
}

　　

 

 

任务五

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

int main()
{
    int d,g,j=1;
    srand(time(0));
    d=rand()%30+1;
    for(;j<=3;j++)
    {
    scanf("%d",&g);
    if(g==d)
    {printf("right\n");
    j=3;}
    else
    if(g<d)
    printf("猜得早了\n");
    else
    printf("猜得晚了\n");
    }
    printf("正确的day是%d\n",d);
    printf("game over\n");
    return 0;
}

　　

 

 

任务六

#include<stdio.h>
int main()
{
    int i,j,k,n;
    i=1;
    n=1;
    j=1;
    for(;j<=9;j++)
    {
    n=1;
    i=1;
    for(;n<=j;n++)
    {
    k=i*j;
    printf("%d x %d= %-2d",i,j,k);
    printf(" ");
    printf(" ");
    printf(" ");
    i++;
    }
    printf("\n");
    }
    return 0;
}

　　

 

 任务七

#include <stdio.h>
int main() {
    int i, j, n ;
    scanf("%d", &n);
    i = 1;
   
    for (j = 1 ; j <= n ; j++)
    {

    
        while (i <= (j - 1))
        {
                printf(" ");
                printf(" ");
                printf(" ");
                printf("    ");
                i = i + 1;
        }
        printf("\n");
        
        i = 1;
        while (i <=  (j - 1))
        {
            printf(" ");
            printf(" ");
            printf(" ");
            printf("    ");
            i = i + 1;
        }
        i = 1;
        while (i <= (2 * n - 2 * j + 1))
        {
                printf(" ");
                printf("O");
                printf(" ");
                printf("    ");
                i = i + 1;
        }
        
        printf("\n");
        i = 1;
        while (i <=  (j - 1))
        {
            printf(" ");
            printf(" ");
            printf(" ");
            printf("    ");
            i = i + 1;
        }
        i = 1;
        while (i <= (2 * n -2*j+ 1))
        {
            printf("<");
            printf("H");
            printf(">");
            printf("    ");
            i = i + 1;
        }
       
        printf("\n");
        i = 1;
        while (i <=  (j - 1))
        {
            printf(" ");
            printf(" ");
            printf(" ");
            printf("    ");
            i = i + 1;
        }
        i = 1;
        while (i <= (2 * n - 2 * j + 1))
        {
            printf("I");
            printf(" ");
            printf("I");
            printf("    ");
            i = i + 1;
        }
        printf("\n");
        i = 1;
        while (i <=  (j - 1))
        {
            printf(" ");
            printf(" ");
            printf(" ");
            printf("    ");
            i = i + 1;
        }
        printf("\n");
        i = 1;
        while (i <=  (j - 1))
        {
            printf(" ");
            printf(" ");
            printf(" ");
            printf("    ");
            i = i + 1;
        }
        
        printf("\n");
}
	}