Problem_008.c

#include <stdio.h>

int main()
{
        char line[] = "7316717653133062491922511967442657474235534919493496983520312774506326239578318016984801869478851843858615607891129494954595017379583319528532088055111254069874715852386305071569329096329522744304355766896648950445244523161731856403098711121722383113622298934233803081353362766142828064444866452387493035890729629049156044077239071381051585930796086670172427121883998797908792274921901699720888093776657273330010533678812202354218097512545405947522435258490771167055601360483958644670632441572215539753697817977846174064955149290862569321978468622482839722413756570560574902614079729686524145351004748216637048440319989000889524345065854122758866688116427171479924442928230863465674813919123162824586178664583591245665294765456828489128831426076900422421902267105562632111110937054421750694165896040807198403850962455444362981230987879927244284909188845801561660979191338754992005240636899125607176060588611646710940507754100225698315520005593572972571636269561882670428252483600823257530420752963450";
        unsigned long long maxSum = 0;
        unsigned long long sum = 1;
        int counterA = 0;
        int counterB = 0;
        while(line[counterA] != '\0')
        {
                sum = 1;		//because of line 19.
                if(counterA != 1000)
                {

                        for(counterB = 0; counterB < 13; counterB++)
                        {
                                sum = sum * (line[counterA + counterB] - 48);	//I'm subtracting 48 to turn each character to a number.
                        }
                }
                if(counterA == 1000)
                {
                        break;
                }
                if(sum > maxSum)
                {
                        maxSum = sum;
                }
                counterA++;
        }
        printf("Max: %llu\n", maxSum);
        return 0;
}