实验2

实验任务1

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define N 5
#define R1 586
#define R2 701
int main()
{
int number;
int i;
srand( time(0) );
for(i = 0; i < N; ++i)
{
    number = rand() % (R2 - R1 + 1) + R1;
    printf("20228330%04d\n", number);
} 
system("pause");
   return 0;
}

问题1

将随机数限制在R1和R2之间

问题2

随机生成五个在586和701之间的数字，并以202283300xxx的形式输出

实验任务2

#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("%s%s%s", &c1, &c2, &c3);
printf("c1 = %c, c2 = %c, c3 = %c\n", c1,c2,c3);
scanf("%lf,%f", &x, &y);
printf("x = %lf, y = %lf\n", x,y);
system("pause");
return 0;
}

任务3

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

int main()
{
    float temp;  
    float result; 

    printf("请输入温度值：");
    scanf("%f", &temp);
        
        result = temp * 1.8 + 32;
        printf("%.2f摄氏度 = %.2f华氏度\n", temp, result);
    system("pause");

    return 0;
}

 

任务4

#include <stdio.h>

int main()
{
    char color;
    printf("Please input a traffic light color (r, g or y): \n");
    while (scanf("%c", &color) != EOF) 
    {
        if (color == 'r')
        {
            printf("Stop!\n");
        }
        else if (color == 'g') 
        {
            printf("Go go go!\n");
        }
        else if (color == 'y') 
        {
            printf("Wait a minute.\n");
        }
        else 
        {
            printf("Something must be wrong...\n");
        }
        getchar(); 
        
    }

    return 0;
}

 

任务5

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

int main()
{
    int lucky_day; 
    int guess; 
    int chance = 3; 
    srand((unsigned)time(NULL));
    lucky_day = rand() % 30 + 1; 

    printf("猜一下吧，开始咯，三次机会(1~30): \n");
    while (chance > 0) 
    {
        scanf("%d", &guess);
        if (guess == lucky_day) 
        {
            printf("哇，猜中了👍：（\n");
            break;
        }
        else if (guess > lucky_day)
        {
            printf("晚了👎\n", --chance);
        }
        else 
        {
            printf("早了👎\n", --chance);
        }
    }
    if (chance == 0) 
    {
        printf("👎👎👎 %d.\n", lucky_day);
        
    }
    system("pause");
    return 0;
}

 

任务6

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

int main()
{
    int i, j;
    for (i = 1; i <= 9; i++)
    {
        for (j = 1; j <= i; j++)
        {
            printf("%d*%d=%-2d ", j, i, i*j); // %-2d 表示左对齐，占2个字符位置
        }
        printf("\n");
        
    }
    system("pause");
    return 0;
}

 

任务7

#include<stdio.h>
#include<stdlib.h>
int main()
{
    printf("请输入行数：");
    int n,i,y,v,a=1;
    scanf("%d",&n);
    for(i=n;i>=1;i--){
        for(v=1;v<a;v++)
            printf("\t");
        for(y=1;y<=(2*i-1);y++){
            printf(" O \t");
        }
        printf("\n");
        for(v=1;v<a;v++)
            printf("\t");
        for(y=1;y<=(2*i-1);y++){
            printf("<H>\t");
        }
        printf("\n");
        for(v=1;v<a;v++)
            printf("\t");
        for(y=1;y<=(2*i-1);y++){
            printf("I I\t");
        }
        printf("\n");
        a++;   
    }
    system("pause");
    return 0;
}