ProjectEuler/src/main.c

#include <stdio.h>

/*
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:

1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...

By considering the terms in the Fibonacci sequence whose values do not exceed four million, find the sum of the even-valued terms.

https://projecteuler.net/problem=2
*/
int main(int argc,char**argv) {
    int fibStorage[1000];
    int val=0;
    int counter=0;
    int sum=0;
    while (val<4000000) {
        if (counter>2) {
            val=fibStorage[counter++]=fibStorage[counter-2]+fibStorage[counter-1];
        } else {
            val=fibStorage[counter++]=counter;
        }
        printf("Fib %d is %d\n",counter,val);
        if ((val&1)==0) {
            sum+=val;
        }
    }
    printf("Sum: %d",sum);
    return 0;
}