jueves, 5 de marzo de 2015

Valor Absoluto de un número en c++ – Accident – Money – Motor – Accident – Record

Valor absoluto c++ tutorial

Elvalor absoluto de un número real es su valor numérico sin tener en cuenta su signo, sea este positivo o negativo,el valor absoluto se refiere a la distancia que existe desde un número al origen.
Ejemplo el valor absoluto de 3 es 3 a su vez el valor absoluto de -3 es 3.

--------------------------------------------------
-3 2 1 0 1 2 3

Sí observamos la recta real, la distancia que existe desde 0 a -3 es 3, similarmente de 0 a 3.

Para encontrar elvalor absoluto de un número en c++, haremos uso de la funciónabs de la libreríastdlib.h

Vamos a hacer un programa en c++ que nos pida que ingresemos por teclado un número entero cualquiera y nos imprima su valor absoluto.

#include iostream
#include stdlib.h
//#include
using namespace std;

int main(){
 int a;
 int absoluto;
 cout  "Ingrese un número"  endl;
 cin  a;
 absoluto = abs(a);
 cout  "El absoluto de "  a  " es "  absoluto;
 return 0;
}

Declaramos dos variables de tipo int y pedimos al usuario queingrese un número entero cualquiera. Posterior a estoguardamos el número en la variablea y obtenemos su valor absoluto con la funciónabs, el resultado lo guardamos en la variableabsoluto. Finalmente imprimimos el resultado.

Salida:

Ingrese un número
-5
El absoluto de -5 es 5

Vamos a hacer algo un poco mas interesante...

Realicemos un programa en c++ el cual nos generealeatoriamente 10 número enteros (positivos y negativos) y nos imprima su valor absoluto.

#include iostream
#include stdlib.h

using namespace std;

int main(){
 int a;
 for(int i = 0; i  10; i++){
 a = rand()%10 - 6;
 cout  "El absoluto de "  a  " es "  abs(a)  endl;
 }
 return 0;
}

Creamos una variablea de tipoint,posterior a esto hacemos un ciclo for que se repetirá 10 veces, en cada ciclo la variablea tomará un valor aleatorio que será el resultado derand()%10 - 6,donderand()%10 nosgenera un número aleatorio entre 0 y 9 (10 - 1) y a este número aleatorio lerestaremos 6 (con el objetivo de obtener números negativos en algunas ocasiones). Por último, imprimimos el número aleatorio guardado en la variablea y su valor absoluto obtenido por lafunción abs.

Salida:

El absoluto de -5 es 5
El absoluto de 1 es 1
El absoluto de -2 es 2
El absoluto de -6 es 6
El absoluto de 3 es 3
El absoluto de -2 es 2
El absoluto de 2 es 2
El absoluto de 2 es 2
El absoluto de -4 es 4
El absoluto de -2 es 2


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  2. Elemento menor de un vector en C++ (min_element)
  3. Elemento mayor de un vector en C++ (max_element)
  4. Algoritmo - Factorial de un número en C++
  5. Matriz de la relación predecesor inmediato en c++.


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