int main() {
...
process()
...
}

void process() {
...
int li = 0;
int hi = 10;

sort(li, hi);
...
}

sort(int low, int high) {
printf("%i, %i\n", low, high); // works
int h = high; // unknown what happens
printf("%d\n", h); // doesn't work.
...
}