C语言超市管理系统设计

2023-09-16 02:58:05 208
本文实例为大家分享了C语言超市管理系统设计的具体代码，供大家参考，具体内容如下
#include
#include
#include
#defineNUM5

structitem{
charbrand[20];
charid[10];
floatin_price;
floatout_price;
intstorage;
};
structitem_node{
structitemwanted;
intamount;
structitem_node*next;
};

intmenu();
voidestablish();
voiddis_all();
voidshop_cart();
intcart_menu();
voidadd();
voiddisplay();
voidcalculate();

structitemgoods[NUM];
structitem_node*cart;


voidmain()
{
printf("***********************************\n");
printf("欢迎进入超市管理系统\n");
printf("***********************************\n");
while(1)
{
switch(menu())
{
case1:
establish();break;
case2:
dis_all();break;
case3:
shop_cart();break;
case4:
calculate();break;
case5:
printf("感谢使用，再见!\n");
exit(0);
}
}
}

intmenu()
{
charstr[5];
intselect;
printf("\n\n请选择数字进行操作\n");
printf("1.建立库存信息\n");
printf("2.显示所有信息\n");
printf("3.购物车\n");
printf("4.结算\n");
printf("5.退出\n");
printf("请选择对应数字1--5");
while(1)
{
fflush(stdin);
gets(str);
select=atoi(str);
if(select<1||select>5)
printf("输入错误，请重新输入:");
else
break;

}
returnselect;

}

voiddis_all()
{
inti;
FILE*fp;
fp=fopen("goods","r");
for(i=0;(fread(goods+i,sizeof(structitem),1,fp))!=0;i++)
{
printf("---------------------------------\n");
printf("货品品名单价库存量\n");
printf("%s%7s%7.2f%8d\n",goods[i].id,goods[i].brand,goods[i].out_price,goods[i].storage);

}
fclose(fp);
}


voidshop_cart()
{
while(1)
{
switch(cart_menu())
{
case1:
display();break;
case2:
add();break;
case3:
return;
}
}
}
intcart_menu()
{
charstr[5];
intselect;
printf("\n请选择操作\n");
printf("-----------------------\n");
printf("1.显示当前购物列表\n");
printf("2.添加商品\n");
printf("3.退出\n");
printf("-----------------------\n\n");
while(1)
{
fflush(stdin);
gets(str);
select=atoi(str);
if(select<1||select>3)
printf("输入错误，请重新输入:");
else
break;
}
returnselect;
}

voiddisplay()
{
structitem_node*p=cart;
if(p==NULL){
printf("购物车为空\n");
return;
}
while(p!=NULL){
printf("----------------------------------\n");
printf("货号品名单价数量\n");
printf("%10s%20s%7.2f%8d\n",p->wanted.id,p->wanted.brand,p->wanted.out_price,p->amount);
p=p->next;
}
}

voidadd()
{
FILE*fp;
inti,n;
charstr[20];
charchoice1,choice2;
structitem_node*p,*p1;
do
{
printf("输入所需物品的名称或货号:");
fflush(stdin);
gets(str);
if((fp=fopen("goods","r"))==NULL){
printf("打开文件失败\n");
continue;
}
for(i=0;fread(goods+i,sizeof(structitem),1,fp)!=0;i++){
if((strcmp(goods[i].brand,str)==0||strcmp(goods[i].id,str)==0)&&goods[i].storage!=0){
printf("已经找到所需物品:\n");
printf("---------------------\n");
printf("货号品名单价库存量\n");
printf("%s%6s%3.2f%4d\n",goods[i].id,goods[i].brand,goods[i].out_price,goods[i].storage);
printf("请输入所需数量:");
scanf("%d",&n);
if(n>goods[i].storage){
printf("库存不足\n");
break;
}
printf("\n是否购买?(Y/N)");
fflush(stdin);
choice1=getchar();
if(choice1=='Y'||choice1=='y'){
p1=(structitem_node*)malloc(sizeof(structitem_node));
if(p1==NULL){
printf("内存申请失败!\n");
exit(1);
}
p1->amount=n;
p1->wanted=goods[i];
p1->next=NULL;
p=cart;
if(cart==NULL)
cart=p1;
else{
while(p->next!=NULL)
p=p->next;
p1->next=p->next;
p->next=p1;
}
}
break;
}
}
if(i==NUM)
printf("未找到所需物品\n");
fclose(fp);
printf("是否继续购物?(Y/N)");
fflush(stdin);
choice2=getchar();
}while(choice2=='Y'||choice2=='y');
}


voidestablish(){
FILE*fp;
inti;
printf("请依次输入货物信息:\n");
printf("----------------------------\n");
for(i=0;iwanted.out_price*p->amount;
for(i=0;strcmp(goods[i].id,p->wanted.id)!=0;i++);
goods[i].storage-=p->amount;
p=p->next;
}
printf("总计%7.2f",total);
printf("\n输入实付金额:");
scanf("%f",&pay);
printf("实付:%7.2f找零:%7.2f",pay,pay-total);
if((fp=fopen("goods","w"))==NULL){
printf("打开文件失败.\n");
return;
}
fwrite(goods,sizeof(structitem),NUM,fp);
fclose(fp);
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。
C语言超市管理系统设计

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