Thread: unable to run program

I have following code & i am using Turbo C++ 3.0. I am unable to run this program. Please help me

Code:

main ()
{ 
    int a, b, c;

    a = 5;
    b = 10;
    c = mul (a,b);

    printf (“multiplication of %d and %d is %d”,a,b,c);
}
int mul (int x, int y)
int p;

p = x*y;
    {
return(p);
    }

Originally Posted by c99tutorial

Never tried Turbo C++ 3.0, isnt that program from the 90s or something.

1991.

Originally Posted by grumpy

Have you bothered to read the error messages from your compiler? Even an antique compiler like TC++3 will give you sensible diagnostics on that code.

The characters “ and ” are invalid in C source anyway. Doesn't matter if the current trend is to use 4000-year-old compilers. Actually, I think that 4000 years ago those characters weren't even thought of anyway.

Originally Posted by grumpy

Have you bothered to read the error messages from your compiler? Even an antique compiler like TC++3 will give you sensible diagnostics on that code.

The curly braces associated with the mul() function are misplaced. In C++, it is necessary to specify that main() returns int (a C compiler lets you get away not doing that, a C++ compiler does not), and it is necessary to #include <stdio.h> in order to use printf(). And the function mul() needs to be declared (a "prototype" as a minimum) before code that calls it.

how to use prototype in mul() function? please help

Originally Posted by c99tutorial

Can you run "hello world"? That's the program to start with when trying a new compiler. Never tried Turbo C++ 3.0, isnt that program from the 90s or something.

Code:

#include <stdio.h>

int main(void)
{
    printf("Hello, world!\n");
    return 0;
}

i can run this code correctly. what compiler you are using? please tell me.

Originally Posted by Arunjib Roy

how to use prototype in mul() function? please help

Get a modern compiler and insist that your "school" doesn't use Turbo C.

But if you're adamant:

Code:

#include <STDIO.H>

mul(x, y);

void main (void)
{ 
    int a;
    int b;
    int c;

    a = 5;
    b = 10;
    c = mul (a,b);

    printf ("multiplication of %d and %d is %d",a,b,c);
}

mul(x, y)
   int x;
   int y;
{
    int p;

    p = x*y;
    
    return ((p));
}

Originally Posted by Hodor

Get a modern compiler and insist that your "school" doesn't use Turbo C.

But if you're adamant:

Code:

#include <STDIO.H>

mul(x, y);

void main (void)
{ 
    int a;
    int b;
    int c;

    a = 5;
    b = 10;
    c = mul (a,b);

    printf ("multiplication of %d and %d is %d",a,b,c);
}

mul(x, y)
   int x;
   int y;
{
    int p;

    p = x*y;
    
    return ((p));
}

getting error msgs:

Line 3: Style of function definition is now obsolete
Line 3: Declaration was expected
Line 6: 'main' is not a parameter
Line 6: , expected

Originally Posted by c99tutorial

I use gcc 4.8. For Windows you can download MinGW which provides this. A lot of other projects also bundle it like Code::Blocks and Qt Creator. Why don't you try those out if you want a nicer development environment than a DOS window.

Actually i don't knw how to use those Windows version compilers. thats why i cannot use those though i want to do

For a beginner, Bloodshot Dev C++ is better. Well, I've never tried Turbo C++, so I can't judge.


GCC compiler like MinGW(Windows) is great. The only reason I got it is because there is no GUI support in Visual Studio Express.