Solution to the Project Euler problem #1 - For the multigrad blog (entry 3)

euler1_s3.c

#include <stdio.h>

unsigned int NumberIt()
{
    /* Create a persistant variable x and initialize it to 0 */
    static unsigned int x = 0;
    for (x++; x < 1000; x++) {
        if (x % 5 == 0 || x % 3 == 0) {
            return x;
        }
    }
    /* This section is for looping purposes */
    x = 3;
    return x;
}

int main()
{
    unsigned int lResult, lTmpValue, lLoop;
    for (lLoop = 0; lLoop <= 100000; lLoop++) {
        lResult = 0;

        while (1) {
            lTmpValue = NumberIt();
            if (lTmpValue > 1000) { break; }
            lResult += lTmpValue;
        }
    }
    printf("Result: %u\n", lResult);
    return 0;
}