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function_tracing2

Language/Type: C function basics
Author: Allison Obourn (on 2020/09/14)

What is the output of the following code?

void first() {
    printf("1 ");
}

void second() {
    printf("2 ");
    first();
}

void third() {
    printf("3 ");
    first();
    second();
}

int main() {
    second();
    first();
    second();
    third();
    return 0;
}
Output:

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