C语言第三次作业

#include<stdio.h>//1.三角形
int main()
{

    printf("*\n");
     printf("**\n");
      printf("***\n");
       printf("****\n");
        printf("*****\n");
         printf("******\n");
          printf("*******\n");
           printf("********\n");
            printf("*********\n");
             printf("**********\n");

}

#include<stdio.h>//3.倒三角形
int main()
{
    printf("**********\n");
    printf("*********\n");
    printf("********\n");
    printf("*******\n");
    printf("******\n");
    printf("*****\n");
    printf("****\n");
    printf("***\n");
    printf("**\n");
    printf("*\n");
    return  ; 

}

#include<stdio.h>//2.十行矩形
int main()
{
    printf("**********\n");
    printf("**********\n");
    printf("**********\n");
    printf("**********\n");
    printf("**********\n");
    printf("**********\n");
    printf("**********\n");
    printf("**********\n");
    printf("**********\n");
    printf("**********\n");
}

#include<stdio.h>
int main()//五级制成绩(A~E),输出相应的百分制成绩(0~100)区间
{
    char score;
    scanf("%c",&score);
    switch (score)
    {
        case 'A':
            printf("90~100");
            break;
        case 'B':
            printf("80~89");
            break;
        case 'C':
            printf("70~79");
            break;
        case 'D':
            printf("60~69");
            break;
        case 'E':
            printf("0~59");
            break;
    }
    return ;
}

#include<stdio.h> //华氏温度与摄氏温度的转换
int main()
{
    int F=;//F为华氏温度，C为摄氏温度
    int C;
    C=(*(F-)/);
    printf("%d",C);
    return ;
}

#include<stdio.h>
int main()//100米自由落体
{
    int g=;
    int t=;
    int height;
    height=0.5*g*t*t;
    printf("height=%d",height);
    return ;
}

#include<stdio.h>
int main()//输出整数的个位数字、十位数字和百位数字的值
{
    int a;
    scanf("%d",&a);
    while(a!=)
    {
        printf("%d\n",a%);
        a=a/;
    }
    return ;
}

#include<stdio.h>
#include<math.h>
int main()//分段函数
{
    double x;
    double y;
    scanf("%lf",&x);
    if(x>=)
           y=sqrt(x);
    else
           y=pow(x+,)+*x+/x;
printf("f(x)=%f",y);
return ;
}

#include<stdio.h>
#include<math.h>
int main()//计算存款利息
{
    int year,money;
    double rate,interest;
    printf("请输入存期");
    scanf("%d",&year);
    printf("请输入存款金额");
    scanf("%d",&money);
    printf("请输入年利率");
    scanf("%lf",&rate);
    interest=money*pow(+rate,year)-money;
    printf("利息为%f",interest);
return ;
}

#include<stdio.h>
#include<math.h>
int main()//计算电费
{
    double x,y;
    scanf("%lf",&x);
    if(x<=)
            y=0.53*x;
    else
            y=0.53*+(x-)*0.58;
    printf("电费=%f",y);
    return ;
}