#include<stdio.h>int main()//打印三角形 {    int i,j;    for(j=1;j<=10;j++)    {        for(i=1;i<=11-j;i++)        {            printf("*");        }        printf("\n");    }

#include <stdio.h>int main()//五级制成绩分布 {    int i,A,B,C,D,E,n,s;    A=B=C=D=E=0;    printf("Enter n:");    scanf("%d",&n);    for(i=0;i<n;++i)    {        printf("Enter grade %d:",i+1);        scanf("%d",&s);        switch(s/10)        {        case 1:        case 2:        case 3:        case 4:        case 5:E++;break;        case 6:D++;break;        case 7:C++;break;        case 8:B++;break;        case 9:        case 10:A++;break;        }    }    printf("The number of A(90~100):%d\n",A);    printf("The number of B(80~89):%d\n",B);    printf("The number of C(70~79):%d\n",C);    printf("The number of D(60~69):%d\n",D);    printf("The number of E(0~59):%d\n",E);    return 0;

#include<stdio.h>int main()//高速公路限速处罚{    int x,y;    scanf("%d %d",&x,&y);    double b = (double)(x-y)*100/y;    if (b>50)printf("超过限速 %.0f%%. 吊销执照",b);    if(b>=10&&b<=50)printf("超出限速 %.0f%%. 罚款 200",b);    if(b<10)printf("未超过限速");}