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#include <stdio.h>
// for: int printf(const char *, ...);

void
foo(void)
{
    int a = 42;
    int b = 123;
    printf("foo: a = %d, b = %d\n", a, b);
}

void
bar(void)
{
    int x;
    int y;
    printf("bar: x = %d, y = %d\n", x, y);
}

int
main(void)
{
    foo();
    bar();
}