Dev C++

**kw42chan** · 01-04-2013

Dears

I use Dev C++ in compiling, want to write C. i found there is some error. when i rewrite them, i find it regard me as wrong in C.

Original code.

Code:

Main ()
{
int revenue;
int price;
int quantity;
printf(“Please input the price”)
scanf(“%d”, &price)
printf(“Please input the quantity”)
scanf(“%d”, &quantity)
revenue = price* quantity
printf(“Total revenue is”, &revenue)
}

Code as correct in Dev C++

Code:

# include <stdio.h>int Main ()
{
 int revenue;
 int price;
 int quantity;
 printf("Please input the price %c");
 scanf("%d", &price);
 printf("Please input the quantity %c");
 scanf("%d", &quantity);
 revenue = price*quantity;
 printf("Total revenue is %c", &revenue);
}

PS I m newbie

**jimblumberg** · 01-04-2013

In the following snippet:

Code:

printf("Total revenue is %c", &revenue);

You have a couple of problems. First the "%c" specifier is used when printing a single character, not an int. Second you don't need to use the ampersand since you want to print the variables value, not the address.

Jim

**DeadPlanet** · 01-04-2013

Code:

printf("Please input the quantity %c");

Why did you decide to put a %c here?

int main is case sensitive. it should also be int main(void).

int main(void) should not be on the same line as #include <stdio.h>, this will cause problems. not sure if this is the way it is in your code though or it was just a copying problem.

Format specifier for your last printf is wrong. Also you don't need to use the & operator when supplying (most) arguments to printf. view the documentation for printf to correct this one.

int main( void ) must 'return 0;' at the end.

Good try, despite the few errors it looks like a great program.

**iMalc** · 01-04-2013

The first version has been through something like Microsoft Word that turns the ordinary double-quotes into "smart quotes", which compilers do not understand. You can tell this easily from the lack of string colouring by the syntax hilighter.

**Crossfire** · 01-04-2013

also my compilier been yelling at me for

Code:

int main(void)

says "warning #2117: old-style function definition for 'main'"
so now i use

Code:

int main ( int argc, char *argv[] )

//edit//
NVM, only yells at me when i dont use the void...i think....

**nonpuz** · 01-05-2013

One piece you are still missing, when you define a function with a return value...you have to return a value in it.

Code:

int main(void)
{
...
}

Your compiler should warn about this also..example:

Code:

$ gcc -Wall test.c 
test.c: In function ‘main’:
test.c:3:1: warning: control reaches end of non-void function

It's stating that you declared "main" as a function returning "int". So you need to return an "int" value in your "main" function.

**laserlight** · 01-05-2013

Originally Posted by Crossfire

only yells at me when i dont use the void...i think

Probably, otherwise your compiler has a bug since the version with void is not old-style.

Originally Posted by nonpuz

Your compiler should warn about this also

It should not when compiling with respect to C99 or later because as a special case, a missing return statement in the main function is as if there was a return 0; at the end.

**jamesedmonds** · 01-05-2013

no he has main as Main in both
no int in front of the first file.

before the last }
you may want to put getchar();
and put a return();
if you actually want to see your programs outputs in dos. if not the window will just close to fast to read.

also for your string output you may want to use a space at the end so when you enter a number as input it wont look strange like so

Code:

printf("Please input the price: ");
 scanf("%d", &price);
 printf("\nPlease input the quantity:");
 scanf("%d", &quantity);

instead of

Code:

   printf("Please input the price %c");
   scanf("%d", &price);
   printf("Please input the quantity %c");
   scanf("%d", &quantity);

**jamesedmonds** · 01-05-2013

Code:

//
//
include<stdio.h>
int main(void)
{
   


   getchar()
   return 0;
}

just use this as your template while learning stuff. just fill in main.

**stahta01** · 01-05-2013

Originally Posted by jamesedmonds

Code:

//
//
include<stdio.h>
int main(void)
{
   


   getchar()
   return 0;
}

just use this as your template while learning stuff. just fill in main.

Forgetting the # in front of the include will not help the newbie.

Tim S.

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