#include<stdio.h>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(){    printf("**********\n");    printf("**********\n");    printf("**********\n");    printf("**********\n");    printf("**********\n");    printf("**********\n");    printf("**********\n");    printf("**********\n");    printf("**********\n");    printf("**********\n");}

#include<stdio.h>

#include<stdio.h>int main(){    

    char grade;    printf("请输入等级：");    scanf("%c",&grade);     switch(grade)    {       case‘A‘:          printf("90分~100分");           break;       case‘B‘:          printf("80分~89分");          break;       case‘C‘:          printf("70分~79分");          break;        case‘D‘:          printf("60分~69分");            break;       case‘E‘ :          printf("0~59分");          break;           default:          printf("输入有误");           break;    }     return 0;}

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(){    double F;    printf("请输入华氏温度:\n");    scanf("%lf", &F);    printf("C = %0.2lf\n", 5*(F-32)/9);    return 0;}

#include<stdio.h>int main(){    double height;    int t=3;    height=0.5*9.8*t*t;    printf("height=%.2f\n",height);}

#include<stdio.h>int main(){   int a,b,c,x;    x=152;    a=x%10;    b=(x/10)%10;    c=x/100;   printf("整数152的个位数字是%d，十位数字是%d，百位数字是%d\n",a,b,c);   }

#include<stdio.h>#include<math.h>int main(){    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);}

#include<stdio.h>#include<math.h>int maim (){    double m;    double y;    double r;    double i;    scanf("%lf,%lf,%lf,%lf",m,y,r,i);    printf("interesr=%f",i=m*(1+r,y)-m);
}

#include<stdio.h>#include<math.h>int main () {     double x;    double cost;     printf("输入x的值");     scanf("%lf",&x);    if (x>0&&x<=50)    printf("cost=%f",cost=0.53*x);    else if(x>50)    printf("cost=%f",cost=50*0.53+(x-50)*0.58);    else     printf("Invalid Valuel");     }