求帮忙修改一下这个资源管理系统的程序，怎么我弄了运行不了。谢谢
麻烦修改了弄出正确的以后解说一下我的错误，谢谢#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct electrical_device_management{
char id[10];
char name[30];
char user[10];
char department[20];
int number;
char time[20];
double price;
struct electrical_device_management *next;
};
typedef struct electrical_device_management EDM;
EDM *e=0;
int n=0;
void add(){
EDM *p;
if(e==0){
e=(EDM *)malloc(sizeof(EDM));
e->next=0;
p=e;
}
else{
p=e;
while(p->next!=0) p=p->next;
p->next=(EDM *)malloc(sizeof(EDM));
p=p->next;
p->next=0;
}
printf("Enter the ID: ");
scanf("%s",p->id);
printf("Enter the name: ");
scanf("%s",p->name);
printf("Enter the user: ");
scanf("%s",p->user);
printf("Enter the department: ");
scanf("%s",p->department);
printf("Enter the number: ");
scanf("%d",&(p->number));
printf("Enter the time when it was bought: ");
scanf("%s",p->time);
printf("Enter the price: ");
scanf("%lf",&(p->price));
n++;
}
void edit(){
EDM *p;
if(e==0){
printf("No record available.\n");
return;
}
else{
char id[10];
printf("Enter the ID of the device: ");
scanf("%s",id);
p=e;
while(p!=0){
if(strcmp(p->id,id)==0) break;
p=p->next;
}
if(p==0) printf("No such device exists.\n");
else{
int i;
do{
printf("ID Name User Department Number Time Price\n");
printf("%s %s %s %s %d %s %.2f\n",p->id,p->name,p->user,p->department,p->number,p->time,p->price);
printf("1.Edit the ID 2.Edit the name 3.Edit the user 4.Edit the department 5.Edit the number 6.Edit the time 7.Edit the price 8.Exit\n");
printf("Choose your operation: ");
scanf("%d",&i);
switch(i){
case 1:printf("Enter the new ID: ");scanf("%s",p->id);printf("\n");break;
case 2:printf("Enter the new name: ");scanf("%s",p->name);printf("\n");break;
case 3:printf("Enter the new user: ");scanf("%s",p->user);printf("\n");break;
case 4:printf("Enter the new department: ");scanf("%s",p->department);printf("\n");break;
case 5:printf("Enter the new number: ");scanf("%d",&(p->number));printf("\n");break;
case 6:printf("Enter the new time: ");scanf("%s",p->time);printf("\n");break;
case 7:printf("Enter the new price: ");scanf("%lf",&(p->price));printf("\n");break;
case 8:printf("\n");return;
}
}while(1);
}
}
}
void del(){
EDM *p,*q=0;
if(e==0){
printf("No record available.\n");
return;
}
else{
char id[10];
printf("Enter the ID of the device: ");
scanf("%s",id);
p=e;
while(p!=0){
if(strcmp(p->id,id)==0) break;
q=p;
p=p->next;
}
if(p==0){
printf("No such device exists.\n");
return;
}
else{
char c;
printf("ID Name User Department Number Time Price\n");
printf("%s %s %s %s %d %s %.2f\n",p->id,p->name,p->user,p->department,p->number,p->time,p->price);
printf("Do you really want to delete this record?(y/n)\n");
getchar();
scanf("%c",&c);
if(c=='y'||c=='Y'){
if(q==0){
e=e->next;
free(p);
}
else{
q->next=p->next;
free(p);
}
printf("This record has been successfully deleted.\n");
n--;
}
else return;
}
}
}
void search(){
int i;
EDM *p;
printf("1.By ID 2.By department 3.Exit\n");
printf("Enter the way you want to search: ");
scanf("%d",&i);
if(i==1){
char id[10];
printf("\nEnter the ID: ");
scanf("%s",id);
p=e;
printf("ID Name User Department Number Time Price\n");
while(p!=0){
if(strcmp(p->id,id)==0) printf("%s %s %s %s %d %s %.2f\n",p->id,p->name,p->user,p->department,p->number,p->time,p->price);
p=p->next;
}
}
else if(i==2){
char department[20];
printf("\nEnter the department: ");
scanf("%s",department);
p=e;
printf("ID Name User Department Number Time Price\n");
while(p!=0){
if(strcmp(p->department,department)==0) printf("%s %s %s %s %d %s %.2f\n",p->id,p->name,p->user,p->department,p->number,p->time,p->price);
p=p->next;
}
}
else return;
}
void display(){
EDM *p;
p=e;
if(p==0){
printf("No record exits.\n");
return;
}
printf("ID Name User Department Number Time Price\n");
while(p!=0){
printf("%s %s %s %s %d %s %.2f\n",p->id,p->name,p->user,p->department,p->number,p->time,p->price);
p=p->next;
}
}
void statistics(){
if(e==0){
printf("No record exits.\n");
return;
}
int i=0,j,total_number;
double total_price;
EDM *p,**q;
p=e;
q=(EDM **)calloc(sizeof(EDM *),n);
while(p!=0){
q[i]=p;
p=p->next;
i++;
}
p=e;
printf("1.By name 2.By department 3.Exit\n");
printf("Enter your choice: ");
scanf("%d",&i);
if(i==1){
char name[30];
j=n;
printf("Name Total number Total price\n");
while(j>0){
i=0;
while(i<n){
if(q[i]!=0){
strcpy(name,q[i]->name);
break;
}
i++;
}
i=0;
total_number=0;
total_price=0;
while(i<n){
if(q[i]!=0&&strcmp(name,q[i]->name)==0){
total_number+=q[i]->number;
total_price+=(q[i]->price)*(q[i]->number);
q[i]=0;
j--;
}
i++;
}
printf("%s %d %.2f\n",name,total_number,total_price);
}
free(q);
}
else if(i==2){
char department[20];
j=n;
printf("Department Total number Total price\n");
while(j>0){
i=0;
while(i<n){
if(q[i]!=0){
strcpy(department,q[i]->department);
break;
}
i++;
}
i=0;
total_number=0;
total_price=0;
while(i<n){
if(q[i]!=0&&strcmp(department,q[i]->department)==0){
total_number+=q[i]->number;
total_price+=(q[i]->price)*(q[i]->number);
q[i]=0;
j--;
}
i++;
}
printf("%s %d %.2f\n",department,total_number,total_price);
}
free(q);
}
else return;
}
int main(){
int i;
do{
printf("1.Add 2.Edit 3.Delete 4.Search 5.Display 6.Statistics 8.Quit\n");
printf("Choose your operation: ");
scanf("%d",&i);
if(i==1) add();
else if(i==2) edit();
else if(i==3) del();
else if(i==4) search();
else if(i==5) display();
else if(i==6) statistics();
else{
EDM* p;
while(e!=0){
p=e->next;
free(e);
e=p;
}
break;
}
}while(1);
return 0;
}
