32 lines
599 B
C
32 lines
599 B
C
#include <stdio.h>
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#include <stdlib.h>
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int main(int argc, char* argv[])
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{
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if (argc != 2)
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{
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printf("Usage = ./isPrime <n>");
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return -1;
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}
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int n = atoi(argv[1]);
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int results = 0;
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for (int i = 1; i < n + 1; i++)
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{
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if (n % i == 0)
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{
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printf("%i is divisible by %i\n", n, i);
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results++;
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}
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}
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if (results == 2)
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{
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printf("%i is a prime.\n", n);
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}
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else
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{
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printf("%i is not a prime, as it's divisible by %i numbers other than 1 and %i\n", n, results - 2, n);
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}
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}
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