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April 28, 2023 06:51
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FizzBuzz without strings in C
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| #include <stdio.h> | |
| #include <math.h> | |
| #define LIMIT 100 | |
| #define LF 10 | |
| #define ASCII_ZERO 48 | |
| void printFizz(); | |
| void printBuzz(); | |
| void printNumber(int number); | |
| int fizzBuzzCharCodes[] = {70, 105, 122, 122, 66, 117, 122, 122}; | |
| size_t fizzBuzzLength = sizeof(fizzBuzzCharCodes) / sizeof(int); | |
| int main(void) { | |
| for (int i = 1; i <= LIMIT; i++) { | |
| if (i % 15 == 0) { | |
| printFizz(); | |
| printBuzz(); | |
| putchar(LF); | |
| } else if (i % 3 == 0) { | |
| printFizz(); | |
| putchar(LF); | |
| } else if (i % 5 == 0) { | |
| printBuzz(); | |
| putchar(LF); | |
| } else { | |
| printNumber(i); | |
| putchar(LF); | |
| } | |
| } | |
| } | |
| void printFizz() { | |
| for (int i = 0; i < fizzBuzzLength / 2; i++) { | |
| putchar(fizzBuzzCharCodes[i]); | |
| } | |
| } | |
| void printBuzz() { | |
| for (int i = fizzBuzzLength / 2; i < fizzBuzzLength; i++) { | |
| putchar(fizzBuzzCharCodes[i]); | |
| } | |
| } | |
| void printNumber(int number) { | |
| int digitCount = 0; | |
| int limitLength = (int) log10(LIMIT) + 1; | |
| int digits[limitLength]; | |
| while (number > 0) { | |
| int mod = number % 10; | |
| digits[digitCount] = mod; | |
| digitCount++; | |
| number = number / 10; | |
| } | |
| for (int i = digitCount - 1; i >= 0; i--) { | |
| putchar(digits[i] + ASCII_ZERO); | |
| } | |
| } |
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