i was trying to create a program that manages car fixing records,and everything was working fine until case 6 of this code :
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct{
int day;
int month;
int year;
}date;
typedef struct{
char pie_name[50];
int pie_num;
float pie_price;
}pie_st;
typedef struct{
long car_num;
char car_type[20];
char car_colour[20];
char owner_name[50];
long phone_num;
}own_cars_st;
typedef struct{
int management_num;
long car_num;
date date_of_management;
int pieces_num;
pie_st pie_rec[1000];
float management_fees;
float total_price;
}management_st;
void check_file(FILE *ptf);
void add_car_rec();
void add_management_rec();
int delete_car_rec(long search);
int search_own(char owner[]);
int car_man(long search);
int main(){
int option,c=0,found=1;
long search;
char owner[50];
while(c==0)
{
printf("\nplease enter your choice:\n");
printf("1.add new car record\n");
printf("2.add new car management record\n");
printf("3.delete a car record by number\n");
printf("4.view all car numbers for a specific owner\n");
printf("5.display all management records\n");
printf("6.view a specific car's management records and the total cost\n");
printf("7.view the most used gear piece's number\n");
printf("8.view a list of all cars that had management after a specific date\n");
printf("9.view all cars with changed tires\n");
printf("10.exit\n");
scanf("%d",&option);
switch(option)
{
case 1:
add_car_rec();
break;
case 2:
add_management_rec();
break;
case 3:
printf("please enter the number of the car you want to delete its number:\t");
scanf("%ld",&search);
found=delete_car_rec(search);
if(found==1)
printf("there's no record available for this number!\n");
else
printf("record has been deleted!\n");
break;
case 4:
printf("please enter the name of the owner:\t");
fflush(stdin);
scanf("%[^\n]s",owner);
found=search_own(owner);
if(found==1)
printf("owner was not found!\n");
break;
case 5:
break;
case 6:
printf("please enter the number of the car you want to view its management records:\t");
scanf("%ld",&search);
printf("7");
car_man(search);
printf("8");
if(found==1)
printf("this car number has no management records!\n");
break;
case 7:
break;
case 8:
break;
case 9:
break;
case 10:
c=10;
break;
default:
printf("please choose one of the available options\n");
}
}
return 0;
}
void add_car_rec(){
own_cars_st new_car,old_cars[100];
printf("please enter the car information:\n");
printf("car number:\t");
scanf("%ld",&new_car.car_num);
printf("car type:\t");
fflush(stdin);
scanf("%[^\n]s",new_car.car_type);
printf("car colour:\t");
fflush(stdin);
scanf("%[^\n]s",new_car.car_colour);
printf("owner name:\t");
fflush(stdin);
scanf("%[^\n]s",new_car.owner_name);
printf("phone number:\t");
scanf("%ld",&new_car.phone_num);
FILE *ptf;
int n=0,i,j,fc;
ptf=fopen("owners and cars.bin","ab+");
if(ptf!=NULL){
fseek(ptf,0,2);
fc=ftell(ptf);
rewind(ptf);
if(fc==0)
{
fwrite(&new_car,sizeof(own_cars_st),1,ptf);
fclose(ptf);
}
else{
while(1==fread(&old_cars[n],sizeof(own_cars_st),1,ptf))
{
n++;
}
for(i=0;i<n+1;i++)
{
if(new_car.car_num<old_cars[i].car_num)
{
for(j=n+1;j>i;j--)
{
old_cars[j]=old_cars[j-1];
}
break;
}
}
old_cars[i]=new_car;
fclose(ptf);
ptf=fopen("owners and cars.bin","wb");
check(ptf);
for(i=0;i<n+1;i++)
{
fwrite(&old_cars[i],sizeof(own_cars_st),1,ptf);
}
fclose(ptf);
}
}
}
void add_management_rec(){
FILE *ptf;
int i,count=0,empty;
float sum=0;
management_st new_manage_rec,last_manage_rec;
printf("please enter the new management record information:\n");
printf("fixed car's number:\t");
scanf("%ld",&new_manage_rec.car_num);
printf("date of management:\n");
printf("day:\t");
scanf("%d",&new_manage_rec.date_of_management.day);
printf("month:\t");
scanf("%d",&new_manage_rec.date_of_management.month);
printf("year:\t");
scanf("%d",&new_manage_rec.date_of_management.year);
printf("the number of the used pieces types:\t");
scanf("%d",&new_manage_rec.pieces_num);
printf("please enter each type's information:\n");
for(i=0;i<new_manage_rec.pieces_num;i++)
{
printf("piece #%d\n",i+1);
printf("piece name:\t");
scanf("%s",new_manage_rec.pie_rec[i].pie_name);
printf("number of used pieces:\t");
scanf("%d",&new_manage_rec.pie_rec[i].pie_num);
printf("piece's price:\t");
scanf("%f",&new_manage_rec.pie_rec[i].pie_price);
sum+=new_manage_rec.pie_rec[i].pie_price*(float)new_manage_rec.pie_rec[i].pie_num;
}
printf("management fees:\t");
scanf("%f",&new_manage_rec.management_fees);
new_manage_rec.total_price=new_manage_rec.management_fees+sum;
ptf=fopen("management.bin","ab+");
if(ptf!=NULL)
{
fseek(ptf,0,2);
empty=ftell(ptf);
rewind(ptf);
if(empty==0){
new_manage_rec.management_num=1;
fwrite(&new_manage_rec,sizeof(management_st),1,ptf);}
else
{
fseek(ptf,-sizeof(management_st),2);
fread(&last_manage_rec,sizeof(management_st),1,ptf);
new_manage_rec.management_num=last_manage_rec.management_num+1;
fwrite(&new_manage_rec,sizeof(management_st),1,ptf);
}
}
fclose(ptf);
}
void check(FILE *ptf){
if(ptf==NULL)
{
printf("error!\n");
exit -1;
}
}
int delete_car_rec(long search){
FILE *ptf;
int count=0,i,j,f=1;
own_cars_st avai_cars[100];
ptf=fopen("owners and cars.bin","rb");
check(ptf);
while(fread(&avai_cars[count],sizeof(own_cars_st),1,ptf)==1)
{
count++;
}
fclose(ptf);
if(count==1)
{
if(search==avai_cars[0].car_num)
{
f=0;
ptf=fopen("owners and cars.bin","wb");
fclose(ptf);
}
}
else
{
for(i=0;i<count;i++)
{
if(search==avai_cars[i].car_num)
{
f=0;
for(j=i+1;j<count;j++)
{
avai_cars[i]=avai_cars[j];
}
}
}
ptf=fopen("owners and cars.bin","wb");
check(ptf);
for(i=0;i<count;i++)
fwrite(&avai_cars[i],sizeof(own_cars_st),1,ptf);
fclose(ptf);
}
return f;
}
int search_own(char owner[]){
FILE *ptf;
int found=1,count=0,i;
own_cars_st avai_cars[100];
ptf=fopen("owners and cars.bin","rb");
check(ptf);
while(1==fread(&avai_cars[count],sizeof(own_cars_st),1,ptf))
count++;
fclose(ptf);
for(i=0;i<count;i++)
{
if(strcmp(avai_cars[i].owner_name,owner)==0)
{
found=0;
printf("car#%d:\t%ld\n",i+1,avai_cars[i].car_num);
}
}
return found;
}
int car_man(long search){
printf("*\n");
FILE *ptf;
management_st avai_man[100];
int i,count=0,found=1,j;
float total_cost=0;
printf("0\n");
ptf=fopen("management.bin","rb");
check(ptf);
printf("1\n");
while(1==fread(&avai_man[count],sizeof(management_st),1,ptf))
count++;
fclose(ptf);
printf("2\n");
for(i=0;i<count;i++)
{
if(search==avai_man[i].car_num)
{
found=0;
printf("date of management:\n");
printf("day:\t");
printf("%d",avai_man[i].date_of_management.day);
printf("month:\t");
printf("%d",avai_man[i].date_of_management.month);
printf("year:\t");
printf("%d",avai_man[i].date_of_management.year);
printf("the number of the used pieces types:\t");
printf("%d",avai_man[i].pieces_num);
printf("please enter each type's information:\n");
for(j=0;j<avai_man[i].pieces_num;j++)
{
printf("piece #%d\n",i+1);
printf("piece name:\t");
printf("%s",avai_man[i].pie_rec[j].pie_name);
printf("number of used pieces:\t");
printf("%d",avai_man[i].pie_rec[j].pie_num);
printf("piece's price:\t");
printf("%f",avai_man[i].pie_rec[j].pie_price);
}
printf("management fees:\t");
printf("%f",avai_man[i].management_fees);
}
total_cost+=avai_man[i].management_fees;
}
printf("3\n");
printf("total cost for this car:\t%f",total_cost);
return found;
}
the program seems to crash when calling the function car_man,ive writted few printf to trace when the program crashes and it only reaches printf("7\n"). any help would be appreciated ^.^ p.s. there's no warnings or any thing in the compiler
