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What will be the output of the given program? int main(){void * p;p = calloc(10,sizeof(int));cout<<"The number of bytes reserved are " << 10*sizeof(int);free (p);return 0;}

Question

What will be the output of the given program? int main(){void * p;p = calloc(10,sizeof(int));cout<<"The number of bytes reserved are " << 10*sizeof(int);free (p);return 0;}

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Solution

Claro, aquí tienes la respuesta paso a paso:

  1. Declaración de la función main:

    int main() {
    
  2. Declaración de un puntero void:

    void * p;
    
  3. Asignación de memoria usando calloc:

    p = calloc(10, sizeof(int));
    
    • calloc reserva memoria para una matriz de 10 elementos, cada uno del tamaño de int.
    • calloc también inicializa la memoria reservada a cero.
  4. Impresión del número de bytes reservados:

    cout << "The number of bytes reserved are " << 10 * sizeof(int);
    
    • 10 * sizeof(int) calcula el número total de bytes reservados.
    • sizeof(int) devuelve el tamaño en bytes de un entero.
    • La salida será: "The number of bytes reserved are 40" (asumiendo que sizeof(int) es 4 bytes en el sistema en el que se ejecuta el programa).
  5. Liberación de la memoria reservada:

    free(p);
    
  6. Retorno de la función main:

    return 0;
    }
    

Salida del programa:

The number of bytes reserved are 40

Esto asume que sizeof(int) es 4 bytes en el sistema en el que se ejecuta el programa.

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