Dev C++ If Ejemplos

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Re: Ejercicios resueltos C programacion estructurada « Respuesta #5 en: 29 Febrero 2008, 00:47 » hey.que bien y que casualidad recien en estos dias han iniciado la clase de progrmacion estructurada (apenas hoy comenzare a meterle mano al manual y al compilador) gracias por los. Tengo un problema, en el ejercicio que lo quiero meter, me dice que Error 'gotoxy' was no declared in this scope, entonces copie tal cual este ejercicio y me sale lo mismo, ya puse todas la librerias que son stdio, conio, windows, stdlib, math, entre otras, todas con.h al final y nada, ayudaaaaaa, mi version de dev c es 5.11. Responder Eliminar. C: If and Else Statements. So we've learnt how to collect basic data from the user, but wouldn't it be useful if we could do different things depending on what the user typed in? Well this happens to be a very core concept of computer programming, and we can do exactly as previously described with these things called 'if' statements.

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If-else Statement (C) Controls conditional branching. Statements in the if-block are executed only if the if-expression evaluates to a non-zero value (or TRUE). If the value of expression is nonzero, statement1 and any other statements in the block are executed and the else-block, if present, is skipped. Ejemplo, supongamos que estamos en una fiesta, donde solo se admitan personas mayores de edad, pero nosotros somo enfermos mentales y necesitamos un programa que nos permita saber si la persona es mayor de edad o no, ingresando la edad por pantalla.

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An if statement can be followed by an optional else statement, which executes when the boolean expression is false.

Syntax

The syntax of an if...else statement in C++ is −

If the boolean expression evaluates to true, then the if block of code will be executed, otherwise else block of code will be executed.

Flow Diagram

Example

When the above code is compiled and executed, it produces the following result −

if...else if...else Statement

Dev c if ejemplos 2

An if statement can be followed by an optional else if...else statement, which is very usefull to test various conditions using single if...else if statement.

When using if , else if , else statements there are few points to keep in mind.

  • An if can have zero or one else's and it must come after any else if's.

  • An if can have zero to many else if's and they must come before the else.

  • Once an else if succeeds, none of he remaining else if's or else's will be tested.

Syntax

The syntax of an if...else if...else statement in C++ is −

Example

When the above code is compiled and executed, it produces the following result −