printf

oo im sry...was too tired to notice i pasted the wrong code!

this should have been it:

                           #include <reg52.h>
#include <stdio.h>

void main(void)
{
        unsigned int i;

        unsigned int ans = 0;

        for (i =0; i< 5; i++)
        {
                ans += 2;
        }

        printf("The answer is: %u",ans);

        ans += 2;
}

i cant really think of what is going wrong...:S my actual point of doing this program is in using the printf...but it wasnt working...so i thought of adding some maths...and it actually was stepping them well...but as soon as it reaches printf, it blocks :s

oo im sry...was too tired to notice i pasted the wrong code!

this should have been it:

                           #include <reg52.h>
#include <stdio.h>

void main(void)
{
        unsigned int i;

        unsigned int ans = 0;

        for (i =0; i< 5; i++)
        {
                ans += 2;
        }

        printf("The answer is: %u",ans);

        ans += 2;
}

i cant really think of what is going wrong...:S my actual point of doing this program is in using the printf...but it wasnt working...so i thought of adding some maths...and it actually was stepping them well...but as soon as it reaches printf, it blocks :s

Probably because some thing(s) need to be set up before you can use printf; eg, where do you expect the output from printf to appear...?

This will depend upon which particular compiler you are using - another detail that you have omitted to mention!

I suggest that you start with the "Hello, world" example provided with your compiler...

http://www.keil.com/support/man/docs/gs/

http://www.keil.com/support/man/docs/uv3/uv3_examples.htm

"my actual point of doing this program is in using the printf...but it wasnt working"

When I do 'printf() tests, I usually use a simulator and sprintf() so that I don't have to worry about an device's output driver blocking:

#include <reg52.h>
#include <stdio.h>

char buf[32];

void main(void)
{
    unsigned int i;

    unsigned int ans = 0;

    for (i =0; i< 5; i++)
    {
        ans += 2;
    }

    sprintf(buf, "The answer is: %u",ans);

    ans += 2;

    for (;;);
}