/* q() calls p(). P() defined within q()
 */
#include <stdio.h>
void q(){
     int x = 10, y = 20, z = 30;
     void p(){ printf("x: %d, y: %d, z: %d\n", x, y, z); }
     p();
}
int main(){
    q();
    return 0;
}