A segfaulting program to calculate Fibonacci numbers.

fib.c

#include <stdio.h>

int fib(int n) {
    int f1 = fib(n - 1);
    int f2 = fib(n - 2);
    if (n <= 2)
        return 1;
    return f1 + f2;
}

int main(int argc, char *argv[]) {
    printf("The 4th Fibonacci number is %d\n", fib(4));

    return 0;
}