Question!

[sKeL`]

#include <stdio.h>
void dothing(int a, int b[]);
int main()
{
    int x = 7, y[] = {11};
    dothing(x, y);
    printf("%i %i\n", x, y[0]);
    return 0;
}
void dothing(int a, int b[])
{
     a++;     
     b[0]++;
     return;
}

Why is the answer '7 12' and not '8 12'? Since a is being incremented..

[laserlight]

Why is the answer '7 12' and not '8 12'? Since a is being incremented..

Because a is initialised to be a copy of x, but a is not x.

[r00t]

Because a is initialised to be a copy of x, but a is not x.

i.e you should pass by reference like this

#include <stdio.h>
void dothing(int *a, int b[]);
int main()
{
    int x = 7, y[] = {11};
    dothing(&x, y);
    printf("%i %i\n", x, y[0]);
    return 0;
}
void dothing(int *a, int b[])
{
     *a=*a+1; 
     b[0]++;
     return;
}