作业三160809311王重阳

#include<stdio.h>//三角形
int main()
{
    
    printf("*
");
    printf("**
");
    printf("***
");
    printf("****
");
    printf("*****
");
    printf("******
");
    printf("*******
");
    printf("********
");
    printf("*********
");
    printf("**********
");
    
}

#include<stdio.h>
int main()
{
    printf("**********
");
    printf("**********
");
    printf("**********
");
    printf("**********
");
    printf("**********
");
    printf("**********
");
    printf("**********
");
    printf("**********
");
    printf("**********
");
    printf("**********
");
}

#include<stdio.h>
int main()//十行倒三角型形 
{
    printf("* * * * * * * * * *
");
    printf(" * * * * * * * * *
");
    printf("  * * * * * * * *
");
    printf("   * * * * * * *
");
    printf("    * * * * * *
");
    printf("     * * * * *
");
    printf("      * * * *
");
    printf("       * * *
");
    printf("        * *
");
    printf("         *
");
    return 0;
}

#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 0;
}

#include<stdio.h>
int main()//计算华氏温度100°F对应的摄氏温度
{
    int F=100;
    int C;
    printf("C=%d",C=5*(F-32)/9);
    return 0;
}

#include<stdio.h>
int main()//100米自由落体
{
    int g=10;
    int t=3;
    int height;
    height=0.5*g*t*t;
    printf("height=%d",height);
    return 0;
}

#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!=0)
    {
        printf("%d
",a%10);
        a=a/10;
    }
    return 0;
}

#include<stdio.h>
#include<math.h>
int main()//分段函数 
{
    double x;
    double y;
    scanf("%lf",&x);
    if(x>=0)
           y=sqrt(x);
    else
           y=pow(x+1,2)+2*x+1/x;
printf("f(x)=%f",y);
return 0;           
}

#include<stdio.h>
#include<math.h>
int main()//计算存款利息 
{
    int money,year;
    double rate,interest;
    printf("输入存款金额: ");
    scanf("%d",&money);
    printf("输入存期: ");
    scanf("%d",&year);
    printf("输入年利率: ");
    scanf("%lf",&rate);
    interest=money*pow(1+rate,year)-money;
    printf("interest=%.2f
",interest);
    return 0;
}

#include<stdio.h>
int main()//阶梯电价 
{
    float n;
    printf("月用电量: ");
    scanf("%f",&n);
    if(n<=50)
        printf("月电费:%f
",n*0.53);
    else
        printf("月电费:%f
",50*0.53+(n-50)*(0.53+0.05));
    return 0;
}