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1、#include#definelist"%d....%c...%4.1fYuan.....%dleft",goods[i].number,goods[i].name,goods[i].price,goods[i].quantityfloatM;//M作为钱intA=1,B=1;//A为数量标记，B为金钱标记，1表示有，0表示没有structgoods//定义出物品清单{intnumber;charname;floatprice;intquantity;}goods[4]={{1,'A',0.5,5},{2,'B',4,5},{3,'C',11,5},{4
2、,'D',2,5}};structmoney//定义出钱，数量用于记录补钱的某值张数{floatmoney;intmount;}money[8]={{100,0},{50,0},{20,0},{10,0},{5,0},{1,0},{0.5,0},{0.1,0}};voidmain(){voidchange(floatm);//声明找钱模块intsell(intn,floatm,inta,intb);//声明出售模块inti,n;//i用于循环显示商品列表，n用于记录输入的货号floatm1;//m1用于加钱for(i=0;i<4;i++)printf(list);printf
3、("inputmoneyfirst!");scanf("%f",&M);loop1:printf("youhave%.1fnowyoucanchoosethegoodsnumber,youcanuse0toleave",M);scanf("%d",&n);if(n==0)change(M);else//确认用户是选择高开还是买东西{loop2:sell(n,M,1,1);if(A==0)//货没有了怎么办{printf("thereisnogoods%dleftyouhave%.1finputgoodsnumber,youcanuse0forleave
4、",n,M);scanf("%d",&n);if(n==0)change(M);else{A=1;B=1;//要将标记归位gotoloop2;}}elseif(B==0)//没钱了怎么办{printf("youcanaddmoneyoradd0toleft");scanf("%f",&m1);if(m1==0)change(M);else{M=M+m1;A=1;B=1;//标记要归位gotoloop1;}}else//有钱又有货，继续选gotoloop1;}system("pause");}intsell(intn,floatm,inta,intb){inti=0;whi
5、le(n!=goods[i].number)i++;if(m>=goods[i].price){if(goods[i].quantity>0){goods[i].quantity--;M=m-goods[i].price;for(i=0;i<4;i++)printf(list);printf("youhave%.1fleft",M);}elseA=0;}elseB=0;if(M==0)B=0;//钱用光了return(a);return(b);}voidchange(floatm){inti;//用于辅助输出floatk=m;//用于找钱的时候显示用户余额if(m==0)
6、//钱用光了printf("youhaverunoutofyourmoneythinksforcoming");else{while(m>0.1)//此处若m==0则输入0.3之类的小数时有错误，该错误本人尚未理解for(i=0;i<8;i++)if(money[i].money<=m){m=m-money[i].money;money[i].mount++;i--;//继续检索当前的面额是否符合条件，才会有相同面值出现}printf("thinksforcoming!hereisyourchange%.1f=",k);for(i=0;i<8;i++)if(mon
7、ey[i].mount>0)printf("%.1f*%d+",money[i].money,money[i].mount);printf("%c",8);//消除末尾的+号}}
