/*任意输入三个整数，按从大到小的顺序输出。*/#include <stdio.h>void main(){    int num1,num2,num3,tmp;    printf("输入任意3个整数：逗号分隔\n");    scanf("%d,%d,%d",&num1,&num2,&num3);        if(num1 < num2)    {        tmp = num1;        num1 = num2;        num2 = tmp;        }        if(num1 < num3)    {        tmp = num1;        num1 = num3;        num3 = tmp;    }        if(num2 < num3)    {        tmp = num2;        num2 = num3;        num3 = tmp;        }        printf("%-5d%-5d%-5d\n",num1,num2,num3);    }/*运输公司对用户计算运费.路程越远每公里运费越低.每公里每吨货物的基本运费为p = 3,货物重为w,距离为s,折扣为d,则总运费f的计算公式为f=p*w*s*(1-d)。折扣规则如下：       s <= 250km   没有折扣250  < s <= 500     2%的折扣500  < s <= 1000    5%的折扣1000 < s <= 2000    8%的折扣2000 < s <= 3000    10%的折扣3000 < s           15%的折扣请书写程序，当用户告知货物的重量和运输的距离，自动计算出总运费。*/#include <stdio.h>void main(){    double f,p = 3.0,w,s,d;    printf("请输入本次运送的货物重量和距离，逗号分隔：");     scanf("%lf,%lf",&w,&s);         if(s <= 250)    {        d = 0;     }     else if(s <= 500)    {        d = 2.0 / 100;     }     else if(s <= 1000)    {        d = 5.0 / 100;     }    else if(s <= 2000)    {        d = 8.0 / 100;     }    else if(s <= 3000)    {        d = 10.0 / 100;     }    else    {        d = 15.0 / 100;        }         f = p * w * s * (1 - d);     printf("本次运费是%.2lf元\n",f);    }/* 某企业员工奖金与员工的销售挂钩，其规则如下（超出部分）：销售额  <= 10万              10%10万 < 销售额  <= 20万       7.5%20万 < 销售额  <= 40万       5%40万 < 销售额  <= 60万       3%60万 < 销售额  <= 100万      1.5%100万 < 销售额               1%请书写程序，实现根据输入员工的销售额，自动计算出他的奖金。*/#include <stdio.h>void main(){    double reward,sales;        printf("请输入你本月的销售额：");    scanf("%lf",&sales);         if(sales <= 100000)    {        reward = sales * (10.0 / 100);     }     else if(sales <= 200000)    {        reward = 10000 + (sales - 100000) * 7.5 / 100;     }    else if(sales <= 400000)    {        reward = 10000 + 7500 +  (sales - 200000) * 5 / 100;     }     else if(sales <= 600000)    {        reward = 10000 + 7500 + 10000 + (sales - 400000) * 3 / 100;     }     else if(sales < 1000000)    {        reward = 10000 + 7500 + 10000 + 6000 + (sales - 600000) * 1.5 / 100;        }     else    {        reward = 10000 + 7500 + 10000 + 6000 + 6000 + (sales - 1000000) * 1 / 100;            }        printf("你本月的奖金为：%.2lf\n",reward); }  /* 书写一个程序，可以根据用户的选择，分别运算圆形(要求用户输入半径)、长方形（要求用户输入长和宽）、三角形（要求用户输入底和高）的面积。*/#include <stdio.h>#define PI 3.14 void main(){    int choice;    double s = 0,l,k;     printf("请输入你要计算面积的图形。\n");    printf("1、圆形；2、长方形；3、三角形\n");    scanf("%d",&choice);         switch(choice)    {        case 1:            printf("请输入圆的半径：");            scanf("%lf",&l);            s = PI * l * l;                    break;        case 2:            printf("请输入长方形的长和宽，逗号分隔：");            scanf("%lf,%lf",&l,&k);            s = l * k;            break;        case 3:            printf("请输入三角形的底和高，逗号分隔：");            scanf("%lf,%lf",&l,&k);            s = 0.5 * l * k;             break;        default:            break;        }         printf("面积是：%lf",s);          }  /*输入某年某月某日三个值，判断这是这一年的第几天。*/#include <stdio.h>void main(){    int year,month,date,day = 0;     printf("请输入年月日，用逗号分隔：");    scanf("%d,%d,%d",&year,&month,&date);         switch(month)    {        case 12:            day += 30;         case 11:            day += 31;         case 10:            day += 30;         case 9:            day += 31;         case 8:            day += 31;         case 7:            day += 30;         case 6:            day += 31;         case 5:            day += 30;         case 4:            day += 31;         case 3:            day += 28;         case 2:            day += 31;         case 1:             day += date;     }         if(month > 2)    {        if((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)        {            day += 1;            }            }        printf("这是该年的第%d天\n",day); }