The use of File Handling in C language.....!

File Handling

Let understand how the File Handling is used in C programming.Let see the following C program that will show you how to save our output in file.

Example

		

        
 #include<stdio.h>
 struct employee
  {
    int eid;
    char ename[20];
    float salary;
  };
int main()
{
  int i,n;
  float da,hra,Tsalary;
  struct employee e[100];
  FILE *fp;
  fp = fopen("D:\\text\\op1.txt","w");
  printf("How many records you want to insert:");
  scanf("%d",&n);
  printf("***Enter details of %d employees***",n);
  for(i=0;i<n;i++)
   {
    printf("\n Enter employee id:");
    scanf("%d",&e[i].eid);
    printf(" Enter name of employee:");
    scanf("%s",e[i].ename);
    printf(" Enter salary of employee:");
    scanf("%f",&e[i].salary);
   }
   printf("\n ****The employee details have been saved in Op1.txt You can check now:****");
   for(i=0;i<n;i++)
    {
      fprintf(fp,"\nEmployee id:%d",e[i].eid);
      fprintf(fp,"\nName of Employee:%s",e[i].ename);
      fprintf(fp,"\nSalary of Employee:%.2f₹",e[i].salary);
      da=e[i].salary+e[i].salary*0.02;
      hra=e[i].salary+e[i].salary*0.03;
      Tsalary=da+hra;
      fprintf(fp,"\nFinal salary of %s is:%.2f₹\n",e[i].ename,Tsalary);
    }
    return 0;
  }
  
	

Input

As you can see clearly we have entered all the values in structure fields.
and whatever the input we have entered is stored in file name "op1.txt"

Output

In next articles you will find the File Handling Functions such as fwrite,fopen, getw etc..... We will explian all the functions with their use,synatxes and will explain in Program also!