Help with this c program

[LIONSGATE]

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
 FILE *outfile;
 
 char ch, name;
 float fee, discfee;
 
 outfile = fopen("flightinfo.txt","r");
 
 if (outfile = NULL)
 {
   printf("Record not found!\n");
   exit(1);
 }
 
 printf("Enter the name of passenger for ticket fee discount: ");
 scanf("%s", &name);
 
 
 if (fee >= 15000.00)
   discfee = fee * 0.80;
 else if (fee >= 10000.00)
   discfee = fee * 0.85;
 else if (fee >= 5000.00)
   discfee = fee * 0.90;
 else
   discfee = fee * 0.95;
 
 printf("The ticket fee after discount is $%8.2f\n", discfee);
 
 return 0;
}

BELOW is extract from the txt file:

Louis
CJ777
4578.00
New York
London
2016 11 1
Economy
1
Tom
DL992
3824.00
New York
Tokyo
2016 12 1
Economy
1



I want to calculate the ticket fee after discount from original fee in the txt file, but I have trouble with the codes up there. Please tell me how to do it. Thanks.

[jimblumberg]

Two quick suggestions.

1.) Re-read your text book about the different types of variables. What is the difference between a single character and a string?
2.) Find and study some documentation for scanf(), make sure you always use the correct format specifier for the type, and remember when retrieving a string make sure you use the proper width specifier. By the way the "%s" specifier requires an array of char, not a single character.


Jim

[Matticus]

Also, "fee" is being used before it is given a valid value.

if (outfile = NULL)

Note the difference between = and ==