problem

[cogeek]

i writed the following program:

#include <stdio.h>

main()
{
int fn, fn2, sum;
sum = fn + fn2;
printf("Welcome to the addition machine!\n");
printf("Write a number:");
scanf("%i", fn);
printf("Write second number:");
scanf("%i", fn2);

printf("The number is... %i\n", sum);


}

i don't get any problem in compiling but when running i see this

Welcome to the addition machine!
Write a number:12
Write second number:12
Segmentation fault

what does segmentation fault means becasue i got that in some other programs i writed too!

[Bajanine]

Take a look at this and see if this helps.

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

using namespace std;

int main(int argc, char *argv[])
{
    int fn, fn2, sum;
    sum = fn + fn2;
    printf("Welcome to the addition machine!\n");
    printf("Write a number: ");
    scanf("%i", &fn);
    printf("Write second number: ");
    scanf("%i", &fn2);

    sum = fn + fn2;
    printf("The number is... %i\n", sum);

    system("PAUSE");	
    return 0;
}

It is ALWAYS int main() not main().
You should look up the address of operator '&'.

[cogeek]

Hey i solved the problem by adding & front of fn and fn2!
i forget it again!