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Code for problem set one, Credit not working

I have completed the other set one problems, and wanted to test myself with "Credit". I read through the problem and walk through and wrote code that I believed would work. … bool checksum(long card_number); int checknum(long card_number); int startnum(long card_number); bool valid = false; int num = 0; int first = 0; int second = 0; int main(void) { // prompt user for credit
John Goossens's user avatar