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July 3, 2018 18:50
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/* | |
* Autor: Eduardo Romero | |
* Version: 1.0 | |
* | |
* Programa para calcular los numeros de la serie de | |
* Fibonacci. Se usa el metodo iterativo. | |
* | |
* Por las limitantes del rango de numeros que puede | |
* contener un "unsigned long long" el numero de Fibonacci | |
* que puede mostrar el programa es fibo93. | |
*/ | |
#include <stdio.h> | |
#include <stdlib.h> | |
unsigned long long fibonacci(int num){ | |
/* | |
* Recibe: Numero de la serie de Fibonacci. | |
* | |
* Regresa: El valor correspondiente alo numero | |
* de la serie de Fibonacci. | |
* | |
* Los casos bases son 0 y 1, despues solo es una suma | |
* numero fibo-1 y fibo-2. | |
*/ | |
unsigned long long fibo1, fibo2, fibor; | |
if (num <= 0) | |
return 0; | |
if (num == 1) | |
return 1; | |
fibo1 = 0; | |
fibo2 = 1; | |
for (int i=2; i <= num; i++){ | |
fibor = fibo1 + fibo2; | |
fibo1 = fibo2; | |
fibo2 = fibor; | |
} | |
return fibor; | |
} | |
int main(int argc, char *argv[]){ | |
/* | |
* Recibe: El numero de la serie de Fibonacci desde la | |
* linea de comandos. | |
* | |
* Imprime en pantalla el numero deseado de la serie. | |
*/ | |
unsigned long long resultado; | |
resultado = fibonacci(atoi(argv[1])); | |
printf("fibo[%s] = %llu\n",argv[1],resultado); | |
return 0; | |
} |
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