第六章：选择结构程序设计

#include<stdio.h> int main() { int iDiscount; /*表示折扣*/ int iSpace; /*表示路程*/ int iSwitch; /*表示折扣的检验情况*/ float fPrice,fWeight,fAllPrice; printf("enter the price , weight and space\n"); scanf("%f%f%d",&fPrice,&fWeight,&iSpace); if(iSpace>3000) { iSwitch=12; /*折扣的检验情况为12*/ } else { iSwitch=iSpace/250; /*计算折扣的检验情况*/ } switch(iSwitch) /*使用switch进行检验*/ { case 0: iDiscount=0; break; case 1: iDiscount=2; break; case 2: case 3: iDiscount=5; break; case 5: case 6: case 7: iDiscount=8; break; case 8: case 9: case 10: case 11: iDiscount=10; break; case 12: iDiscount=15; break; default: break; } fAllPrice=fPrice*fWeight*iSpace*(1-iDiscount/100.0); /*计算总价格*/ printf("AllPrice is :%.4f\n",fAllPrice); /*输出结果*/ return 0; }