File-File operations

File-File operations
   #include <stdio.h>
   void main()
   {
     FILE *fptr;
     char name[20];
     int age;
     float salary;
     fptr = fopen ("emp.txt", "w"); /*open for writing*/
     if (fptr == NULL)
     {
       printf("File does not exists \n");
       return;
     }
     printf("Enter the name\n");
     scanf("%s", name);
     fprintf(fptr, "Name = %s\n", name);
     printf("Enter the age\n");
     scanf("%d", &age);
     fprintf(fptr, "Age = %d\n", age);
     printf("Enter the salary\n");
     scanf("%f", &salary);
     fprintf(fptr, "Salary = %.2f\n", salary);
     fclose(fptr);
   }