C语言超市管理系统源代码

#include<stdio.h> #include<stdlib.h>//分配函数 #include<string.h>//字符串操作 #include<conio.h>//getch() struct good//商品结构体 { char name[20];//商品名称 float price;//价格 int n1;//总件数 int n2;//已卖出 }; struct gnode //商品结构体链表 { struct good g; struct gnode *next; }; struct gnode *ghead=NULL,*gi=NULL; void initial_g() { FILE *fp; if((fp=fopen("good.text","r"))==NULL) printf("产商品信息为空！"); else { fseek(fp,0,SEEK_END); int i,j; i=ftell(fp)/sizeof(struct good); rewind(fp); for(j=0;j<i;j++) { struct gnode *p; p=(struct gnode *)malloc(sizeof(struct gnode)); p->next=NULL; fread(&p->g,sizeof(struct good),1,fp); if(ghead==NULL)ghead=gi=p; else{ gi->next=p;gi=gi->next; } } fclose(fp); //printf("\n\n\t\t初始化%d个商品信息成功！",i); } } void inrank() { struct gnode *p=ghead; if(p==NULL) printf("商品利润信息为空！"); else { printf("\n\n\n\n █商品利润信息排名█\n"); int n=0; int i,j; while(p) {n++; p=p->next; } p=ghead; struct good *p1; p1=(struct good *)calloc(n,sizeof(struct good)); for(i=0;i<n;i++) {*(p1+i)=p->g; p=p->next; } struct good t; for(i=0;i<n-1;i++) for(j=0;j<n-1-i;j++) if(p1[j].n2*p1[j].price<p1[j+1].n2*p1[j+1].price) { t= p1[j];p1[j]=p1[j+1]; p1[j+1]=t; } printf("\n|-----------------------------------------------------------------------------|"); for(j=0;j<n;j++) {printf("\n[%d]|商品名: %s 利润总金额:%f 单价: %f 总数: %d 已卖数: %d ",j+1,p1[j].name ,p1[j].n2*p1[j].price,p1[j].price,p1[j].n1,p1[j].n2,p1[j].n2*p1[j].price); printf("\n|-----------------------------------------------------------------------------|");} } printf("\n\n\n\n\n"); } void sellrank() { struct gnode *p=ghead; if(p==NULL) printf("商品销售信息为空！"); else { printf("\n\n\n\n █商品销售排名█\n"); int n=0; int i,j; while(p) {n++; p=p->next; } p=ghead; struct good *p1; p1=(struct good *)calloc(n,sizeof(struct good)); for(i=0;i<n;i++) {*(p1+i)=p->g; p=p->next; } struct good t; for(i=0;i<n-1;i++) for(j=0;j<n-1-i;j++) if(float(p1[j].n2)/p1[j].n1<float(p1[j+1].n2)/p1[j+1].n1) { t= p1[j];p1[j]=p1[j+1]; p1[j+1]=t; } printf("\n|-----------------------------------------------------------------------------|"); for(j=0;j<n;j++) {printf("\n[%d]|商品名: %s 销售量:%.1f%% 单价: %f 总数: %d 已卖数: %d ",j+1,p1[j].name ,float(p1[j].n2)/p1[j].n1*100,p1[j].price,p1[j].n1,p1[j].n2,p1[j].n2*p1[j].price); printf("\n|-----------------------------------------------------------------------------|");} } printf("\n\n\n\n\n"); } void newg() { loop1: struct gnode *p,*p1; p=(struct gnode *)malloc(sizeof(struct gnode)); printf("\n\n\n\n █创建新商品█\n"); loop: printf("\n\n请输入商品名\n\n"); scanf("%s",p->g.name); p1=ghead; while(p1) { if(strcmp(p->g.name,p1->g.name)==0){ printf("\n\n错误，商品名重复！\n"); goto loop;} p1=p1->next; } printf("\n请输入价格\n\n"); scanf("%f",&p->g.price); printf("\n请输入商品总数\n\n"); scanf("%d",&p->g.n1); p->g.n2=0; p->next=NULL; if(ghead==NULL)ghead=gi=p; else{ gi->next=p;gi=gi->next; } printf("\n商品新建成功！\n\n"); printf("\n\n\n|-------------------------|"); printf("\n|您想继续查找商品信息吗？ |\n| 是(Y) 否(N) |"); printf("\n|-------------------------|"); char y; y=getch(); if(y=='Y'||y=='y') goto loop1; } void saveg() { FILE *fp; if((fp=fopen("good.text","w"))==NULL) printf("文件打开失败！"); if(ghead==NULL)printf("产商品信息为空！"); else { int i=0; struct gnode *p=ghead; while(p) { fwrite(&p->g,sizeof(struct good),1,fp); p=p->next; i++; } //printf("\n\n\t\t保存%d个商品信息成功！",i); } fclose(fp); } void showall() { if(ghead==NULL)printf("产商品信息为空！"); else { printf("\n\n\n\n █商品价目信息█\n"); int i=0; struct gnode *p=ghead; printf("\n|--------------------------------------------------------------------------------|"); while(p) { if(p->g.n1-p->g.n2>0) {printf("\n|商品名: %s \t单价: %f 总数: %d 已卖数: %d 剩余数:%d",p->g.name ,p->g.price,p->g.n1,p->g.n2,p->g.n1-p->g.n2); printf("\n|--------------------------------------------------------------------------------|");} if(p->g.n1-p->g.n2<=0) {printf("\n|商品名: %s \t单价: %f \t总数: %d 已卖数: %d 剩余数:%d:\n\n注意，货源为零。请及时进货！",p->g.name ,p->g.price,p->g.n1,p->g.n2,p->g.n1-p->g.n2); printf("\n|--------------------------------------------------------------------------------|");} p=p->next; i++; } printf("\n|商品种类数:%d \t|",i); printf("\n|---------------|\n"); } } void lookg() { if(ghead==NULL)printf("产商品信息为空！"); else { printf("\n\n\n\n █查找商品信息█\n"); loop: int y=1; struct gnode *p=ghead; printf("\n请输入商品名: "); char n[20]; scanf("%s",n); while(p) { if(strcmp(n,p->g.name)==0) { printf("\n|---------------------------------------------------------------------------------|"); printf("\n|商品名: %s \t单价: %f\t总数: %d \t已卖数: %d \t剩余数:%d",p->g.name ,p->g.price,p->g.n1,p->g.n2,p->g.n1-p->g.n2); printf("\n|---------------------------------------------------------------------------------|"); y=0; } p=p->next; } if(y)printf("\n错误，无该商品！ "); } printf("\n\n\n|-------------------------|"); printf("\n|您想继续查找商品信息吗？ |\n| 是(Y) 否(N) |"); printf("\n|-------------------------|"); char y; y=getch(); if(y=='Y'||y=='y') goto loop; } void sellg() { printf("\n\n\n\n █超市收银█\n"); int num,y1=0; float sum=0; char n[20]; struct gnode *p; loop: p=ghead; printf("\n商品名称: "); scanf("%s",n); loop1: printf("\n购买数量: "); scanf("%d",&num); while(p) { if(strcmp(n,p->g.name)==0) { if(num>(p->g.n1-p->g.n2)){printf("\n\n错误，货源不够！\n");goto loop1;} printf("\n|------------------------------------------------------------------------|"); printf("\n|商品名: %s 单价: %f 购买数量 %d请付款：￥:%f",p->g.name ,p->g.price,num,p->g.price*num);p->g.n2+=num; printf("\n|------------------------------------------------------------------------|"); sum+=p->g.price*num; y1++; } p=p->next; } printf("\n\n\n|-------------------------|"); printf("\n还有购买物品？ |\n| 是(Y) 否(N) |"); printf("\n|-------------------------|"); char y; y=getch(); if(y=='Y'||y=='y') goto loop; printf("\n\n您好!\n\n一共购买%d种商品:一共需付￥%f元\n\n",y1,sum); } void modifyg() { if(ghead==NULL)printf("产商品信息为空！"); else { printf("\n\n\n\n █修改商信息█\n"); loop: int y=1; struct gnode *p=ghead; printf("\n请输入要修改的商品名: "); char n[20]; int n3; scanf("%s",n); while(p) { if(strcmp(n,p->g.name)==0) { printf("\n请修改价格[原价格：%f]\n\n",p->g.price); scanf("%f",&p->g.price); loop1: printf("\n请修改商品总数[原总数：%d]\n\n",p->g.n1); scanf("%d",&n3); if(n3<p->g.n2){printf("\n\n错误，修改后的商品总数必须大于或等于已经卖出商品数！");goto loop1;} p->g.n1=n3; y=0; } p=p->next; } if(y)printf("\n错误，无该商品！ "); } printf("\n\n\n|-------------------------|"); printf("\n|您想继续修改商品信息吗？ |\n| 是(Y) 否(N) |"); printf("\n|-------------------------|"); char y; y=getch(); if(y=='Y'||y=='y') goto loop; } void deleteg() { if(ghead==NULL)printf("产商品信息为空！"); else { printf("\n\n\n\n █删除商信息█\n"); loop: int y=0,y1=1; struct gnode *p=ghead,*p1=ghead; printf("\n请输入要删除的商品名: "); char n[20]; int n3; scanf("%s",n); while(p) { if(strcmp(n,p->g.name)==0) { if(p==ghead)ghead=ghead->next; else {p1->next=p->