if else statement logic not working

[Alistair888]

Im reading diving into c++ by alex alain. The challenge is to do an if else statement that prints out the differences in two users ages and prints a "not allowed" statement if the ages are over 100. I cant get it to seperate between the age difference and the over 100 ruloe, where am I going wrong please help. I just want it to say a is greater than b or vice versa or the ages are over 100 and the program is terminated. Thanks.

  #include <iostream>

using namespace std;

int main()
{
	
	int a,b;
	
	cout << "Enter age no: 1.\n";
	cin >> a;
	cout << "Enter age no: 2.\n";
    cin >> b;
	
	if ( a || b < 100 && a < b )
	{
		cout << "Age 1 is less than age 2.\n";
		goto lable;
	}
	
	else if (a || b < 100 && b < a )
	{
    cout <<"Age 1 is greater than age 2.\n";
    goto lable;
	}
	
	else ( a || b > 100);
    {
     cout << "No ages over 100 allowed\n";
     goto lable;
     }
		              lable:
		              {
		              	cout << "The program has finished have a good day\n";
		              }
		              
		              
}

[jonnin]

goto is heavily frowned upon and generally is a red flag for a design flaw/problem.

there are many other issues.
if and else statemetns are explicit. That is,
else (x || y) is not doing what you think even if it compiles.

the syntax is
if (condition)
true_code
else
if (another condition)
special false code
else
default false code

so your code
else( a || b > 100) has multiple problems
first. it should be
else if (a || b > 100)
but it is still not explicit enough, it evaluates a == 0 (false)_ else true OR b > 100, it does NOT evaluate a and b both > 100
you want
else if (a > 100 && b > 100)

and in general your needs for this program are simply (notice no gotos, notice nested condition use to do what the gotos did)

if(a > 100 && b > 100)
{
 if (a > b) 
     cout >> a>b statement
 else
     if (a == b) 
     cout >> a == b statement
   else cout >> b > a statement
}
else cout << invalid values statement
cout >> program ended statement

[Uk Marine]

Hi, maybe something like this?

#include <iostream>

int main()
{
	int a, b;

	std::cout << "Enter age no: 1.\n";
	std::cin >> a;
	std::cout << "Enter age no: 2.\n";
	std::cin >> b;

	if (a < b && a < 100 && b < 100)
	{
		std::cout << "Age 1 is less than age 2.\n";
	}
	else if (a > b && a < 100 && b < 100)
	{
		std::cout << "Age 1 is greater than age 2.\n";
	}
	else if (a > 100 || b > 100)
	{
		std::cout << "No ages over 100 allowed\n";
	}

	int iTemp = 0;
	std::cin >> iTemp;
	return 0;
}