сравнение трех целых чисел в C++

1 2 3
x y z

if( x > y && x > z)
вывод x - max
if( x < y && x < z)
вывод x - min
ну и еще 4 таких ифа ...хотя думаю можно изваратится к более компактной записи

без базара пиши в агент

Ну и в чом проблема :))

Conditionally executes a group of statements, depending on the value of an expression.

if (condition)
statement1
[else
statement2]
Arguments
condition
Required. A Boolean expression. If condition is null or undefined, condition is treated as false.
statement1
Optional. The statement to be executed if condition is true. Can be a compound statement.
statement2
Optional. The statement to be executed if condition is false. Can be a compound statement.
Remarks
It is generally good practice to enclose statement1 and statement2 in braces ({}) for clarity and to avoid inadvertent errors.

Example
In the following example, you may intend that the else be used with the first if statement, but it is used with the second one.

if (x == 5)
if (y == 6)
z = 17;
else
z = 20;
Changing the code in the following manner eliminates any ambiguities:

if (x == 5)
{
if (y == 6)
z = 17;
}
else
z = 20;
Similarly, if you want to add a statement to statement1, and you don not use braces, you can accidentally create an error:

if (x == 5)
z = 7;
q = 42;
else
z = 19;
In this case, there is a syntax error, because there is more than one statement between the if and else statements. Braces are required around the statements between if and else.