#include<stdio.h>#include<math.h>int main(){     int a,b,c,l,p,s;     printf("请输入三个数：");     scanf("%d%d%d",&a,&b,&c);       if(a+b>c && a-b<c)    {        l=a+b+c;        p=(a+b+c)/2;        s=sqrt(p*(p-a)*(p-b)*(p-c));        printf("此三条边可以构成三角形:\n");        printf("三角形的周长为 :%d\n三角形的面积为：%d",l,s);       }    else        printf("此三条边不可以构成三角形：");    return 0;}   

#include<stdio.h>int main(){    float a,tax=0,TaxIncome=0;    printf("请输入您的工资：");    scanf("%f",&a);    if(a<=1455)    {        tax=(a-3500)*0.03-0;        TaxIncome=a-tax;    }    else if(a>1455 || a<=4155)    {        tax=(a-3500)*0.1-105;        TaxIncome=a-tax;    }    else if(a>4155 || a<=7755)    {        tax=(a-3500)*0.2-555;         TaxIncome=a-tax;    }    else if(a<7755 || a<=27255)    {        tax=(a-3500)*0.25-1005;        TaxIncome=a-tax;    }    else if(a>27255 || a<=41255)    {        tax=(a-3500)*0.3-2755;        TaxIncome=a-tax;    }    else if(a>41255 || a<=57505)    {        tax=(a-3500)*0.35-5505;        TaxIncome=a-tax;    }    else    {        tax=(a-3500)*0.45-13505;        TaxIncome=a-tax;    }    printf("您本月应缴税为：%f\n您本月应的税后收入为：%f\n",tax,TaxIncome);    return 0;}

#include<stdio.h>#include<stdlib.h>#include<time.h>int main(){    int yournumber,mynumber,count=0;       char c;    do    {        srand((unsigned)time(NULL));        mynumber=(rand()%(101-1)+1);        do        {            printf("请输入您所猜的数字：");            scanf("%d",&yournumber);            count++;            if(yournumber>mynumber)                printf("对不起您猜大了，请重新输入\n");            else if (yournumber<mynumber)                printf("对不起您猜小了，请重新输入\n");            else if(yournumber==mynumber)                printf("恭喜您猜对了！：\n");            else                printf("您的数字不合法，请重新输入:\n");        }while(yournumber!=mynumber);    printf("您一共猜了：%d次\n",count);    if(count<=3)        printf("Great！您真是一个天才！\n");    else if(count>4 && count<=7)        printf("亲，不用担心，您的智力还是正常的哦！\n");    else        printf("亲，建议您不要从事虚要智商的活动：\n");1234567<em id="__mceDel">    printf("如果您还想继续的话，请你按y|Y，退出请按n|N:");    getwchar();    c=getwchar();    system("cls");    } while(c==‘y‘||c==‘Y‘);    return 0;}    </em>