Thread: Problem with simple c program

My problem is simple the program asks for 2 numbers. Then takes the two numbers Price and Quantity and stores them in TotalRevenue. The program terminates before it asks for the second number Quantity. It won't let me enter it in. here's the code. There's no errors in the code that's one reason I can't figure it out. If someone has a clue as to what's going on it would be much appreciated. I've been trying to figure this out for two days now.

Code:

#include <stdio.h>
#include <stdlib.h>

int main()
{
  float Price = 0;
  int Quantity = 0;
  float TotalRevenue; 
  
  printf("\nEnter Price: ");
  scanf("%.2f",&Price);
  printf("\nEnter Quantity: ");
  scanf("%d",&Quantity);
  
  TotalRevenue = Price * Quantity;
  
  printf("\nThe total revenue is: $%.2f\n",TotalRevenue);
  
  system("PAUSE");	
  return 0;
}

If you aren't receiving any compiler warnings, you need to turn up the warning levels.

Code:

main.c||In function 'main':|
main.c|11|warning: unknown conversion type character '.' in format|
main.c|11|warning: too many arguments for format|
||=== Build finished: 0 errors, 2 warnings ===|

Unlike "printf()", you don't need to use a precision modifier with "scanf()". Try just using "%f".

Actually, your code works fine for me. I just got rid of the .2 part of your first scanf because when I compiled with it, it didn't like it.

Here's my output:

Code:

Enter Price: 123


Enter Quantity: 34


The total revenue is: $4182.00
sh: PAUSE: command not found

I think the PAUSE thing is an OS difference thing but the code finishes.

Originally Posted by MutantJohn

Actually, your code works fine for me. I just got rid of the .2 part of your first scanf because when I compiled with it, it didn't like it.

Here's my output:

Code:

Enter Price: 123


Enter Quantity: 34


The total revenue is: $4182.00
sh: PAUSE: command not found

I think the PAUSE thing is an OS difference thing but the code finishes.

[QUOTE]
Hey thanks, man you figured that out in one second and I couldn't figure it out for two days dam I feel like a moron!

Hey thanks guys I didn't think about scanf it isn't like the printf like you said Wow I wish that would have occured to me

Hey thanks, man you figured that out in one second and I couldn't figure it out for two days

Allow me to repeat myself - maximize your compiler warnings. You could have figured this out yourself in a second had you done so.

Originally Posted by Matticus

Allow me to repeat myself - maximize your compiler warnings. You could have figured this out yourself in a second had you done so.

i hear this from time to time in this forum. how do you do so? i run both OSx and Linux therefore im just

Code:

gcc -o foo foo.c

what do i need to add to "maximize" my compiler warnings?

-Wall (or -Wextra)
-Werror
-Wpedantic
...etc

(source)