[Dev-C++] Fibonacci numbers / unsigned long long int

[Dion B. <dio...@in...>]

Hello

The following code, when assembled by dev-cpp calculates the incorrect 49th Fibonacci number, which should be 4807526976. However, when compiled by another assembler (lc.exe), it works fine.

The 47th Fibonacci (1836311903) and 48th Fibonacci (2971215073) are 
calculated correctly, but when they're added together to create the 49th 
Fibonacci, the answer is incorrectly calculated and displayed.

Does Dev-C have to be configured in any special way to handle unsigned 
long long integers?
 
/* Generate Fibonacci numbers using variable length arrays  */
 
#include <stdio.h>
 
int main (void)
{
    int i, numFibs;
 
    printf ("How many Fibonacci numbers do you want (between 1 and 75)?");
    scanf ("%i", &numFibs);
 
    if ( numFibs < 1 || numFibs > 75 ) {
       printf ("\nNumber must be between 1 and 75!!\n");
       return (1);
    }
 
    unsigned long long int Fibonacci[numFibs];
 
    Fibonacci[0] = 0;  // by definition
    Fibonacci[1] = 1;  // by definition
 
    for ( i = 2; i < numFibs; ++i )
        Fibonacci[i] = Fibonacci[i-2] + Fibonacci[i-1];
 
    for ( i = 0; i < numFibs; ++i )
        printf ("%llu\n", Fibonacci[i]);
 
    printf ("\n");
 
    return (0);
}