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September 27, 2019 01:37
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/* | |
Número primo en C++ o CPP | |
https://parzibyte.me/blog | |
*/ | |
#include <iostream> | |
// Definir prototipo de función | |
bool esPrimo(int numero); | |
int main() { | |
int numero; | |
std::cout << "Escribe un número y te diré si es primo:\n"; | |
std::cin >> numero; | |
if (esPrimo(numero)) { | |
std::cout << "Es primo"; | |
} else { | |
std::cout << "NO es primo"; | |
} | |
} | |
bool esPrimo(int numero) { | |
// Casos especiales | |
if (numero == 0 || numero == 1 || numero == 4) return false; | |
for (int x = 2; x < numero / 2; x++) { | |
if (numero % x == 0) return false; | |
} | |
// Si no se pudo dividir por ninguno de los de arriba, sí es primo | |
return true; | |
} |
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