write a program that get student information and validate inputs . if inputs was valid show success message otherwise show correct error message .

student_input_validation.cpp

#include<iostream>
#include<string>

using namespace std;

bool isNameValid(string name){
	int length = name.length(); // name.size() ; strlen(name.c_str);
	if (length > 40 || length < 5)
		return false;
	else
		return true;
}

bool isStudentIdValid(string studentId){
	int length = studentId.size();
	if (length == 9)
		return true;
	else
		return false;
}

bool isAgeValid(int age){
	if (age > 120 || age < 17)
		return false;
	else
		return true;
}

int main(){
	string studentId, name;
	int age;
	bool wrongInputFlag = false;
	// get inputs
	cin >> name >> studentId >> age;
	// validation inputs
	// name's length should be between 5 and 40
	if (!isNameValid(name)){
		cout << "Your name is incorrect" << endl;
		wrongInputFlag = true;
	}
	// studentId's length shoudl be exactly 9 character
	if (!isStudentIdValid(studentId)){
		cout << "Your student id is incorrect" << endl;
		wrongInputFlag = true;
	}
	// age should be between 17 and 120 
	if (!isAgeValid(age)){
		cout << "Your age is incorrect" << endl;
		wrongInputFlag = true;
	}
	// show errors if inputs was incorrect
	// if all inputs was correct show success message
	if (wrongInputFlag == false)
		cout << "Your information saved successfully" << endl;

}