#include <stdio.h> 

int main()
{
    int price =0;
    int bill =0;
    //读入金额和票面
    printf("请输入金额") ;
    scanf("%d",&price);
    printf("请输入票面");
    scanf("%d",&bill);
    //计算找零
    if (bill>=price)
    {
    printf("应找您：%d\n",bill-price);
    }
     else{
         printf("你的钱不够");
        }
    return 0; 
}

# include <stdio.h>

int main()
{
    const double RATE =8.25;
    const int STANDARD =40;
    double pay =0.0;
    int hours;

    printf ("请输入工作小时数；"); 
    scanf("%d",&hours);
    printf("\n");
    if(hours>STANDARD)
        pay = STANDARD * RATE + (hours - STANDARD)*(RATE * 1.5);
    else
        pay = hours * RATE;
    printf("应付工资%f\n",pay);

    return 0;

}

# include <stdio.h>

int main ()
{
    int a,b,c;
    int max = 0;
    scanf("%d %d %d",&a,&b,&c);

    if (a>b)
        if(a>c)
            max = a;
        else
            max = c;
    else
        if(b>c)
            max = b;
        else
            max = c;
printf("最大值是%d\n",max);
return 0;
}
  

# include<stdio.h>

int main()
{
    int a;
    printf("请输入您的分数");
    scanf("%d",&a);

    if (a>=90){
    printf("A") ;
    } else if(a>=80){
    printf("B");
    } else if(a>=70){
    printf("C");
    } else if(a>=60){
    printf("D");
    }else{
    printf("E");
    }
    return 0;
} 

# include<stdio.h>

int main()
{
    int a;
    printf("请输入您的分数");
    scanf("%d",&a);

    a /= 10;  //a=a/10
    switch(a){
        case 10:
        case 9:
          printf("A\n");break;
        case 8:
          printf("B\n");break;
        case 7:
          printf("C\n");break;
    case 6:
          printf("D\n");break;
        default:
          printf("E\n");break;
        }
        return 0;
}