How to Apply Input Validation In C++ Programs [Ultimate Guide] 2019

what is Input Validation

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The Process In which We put the validation in any software 

By Input Validation Mean Put the limitations in any software or programm

Why We Use Input Validation In C++

By Using Input validation our programm or software can make valueable Bcz By using Validation In Software the Software give or take the accurates values or things

For Examples 
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We Make the  Student Management System Software in which we put the name age class date of birth :etc,

Input validation mean programm accept only value or data type  which we give 

For  Example :

we Take int id then c++ programm accept only integer type :

If we give character for id then Programm Not Accept this Data

(With out input validation)

char name ;

int birth;

We entered the name: 45

we entered the birth date :Ali 
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(With Input Validation)

Int birth;

char name;

int age;

cout<<"Plz Enter the Name ";

cin>>name;

while(!cin)

{

cout<<"Plz Enter the Name";

cin>>name;

}

cout<<"Plz Enter the Age " ;

cin>>age;

if(age>1&&age<=100)

{

}

else

cout<<"Plz Enter the Age";

cin>>age;

if(age>1&&age<=100)

{

cout<<"Age correct";

}

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Complete Example of Input Validation In C++

#include<conio.h>

#include<iostream.h>

 void main()

{

int id;

char name;

int age;

cout<<"Plz Enter the Id";

cin>>id;

while(!cin)

{

cout<<"Plz Enter the ID";

cin>> id;

}

cout<<"Plz Enter The name ";

cin>>name;

while(!cin)

{

cout<<"Plz Enter the Correct Name";

cin>>name;

}

cout<<"Plz Enter the Age";

cin>age;

if(age>0&&age<=100)

{

cout<<"Plz Enter The Age";

cin>>age;

}

getch();

}

(Let,s Try on Your Own Compiler)

Good Luck !!!