Page 42 - DCAP404 _Object Oriented Programming
P. 42
Unit 2: Beginning of OOP Language
The operator, !=, is an equivalent of not equal to, and is written without any space between ! Notes
and =.
The general form of an if statement which includes the else clause is:
If (expression) statement1 else statement2;
If the expression has a nonzero value (i.e., if expression is true), then statement1 will be executed.
Otherwise (i.e., if expression is false), statement2 will be executed.
Example:
#include <stdio.h>
int main() {
int x = 0;
if ( 1 ) // if statement #1
// {
if ( !x ) // if statement #2
printf_s(“!x\n”);
else // paired with if statement #2
printf_s(“x\n”);
// }
}
The following, for example, program uses a nested if...else construct to check if the input character
is uppercase or lowercase.
#include <iostream.h>
int main()
{
char inp;
cout << “Please enter a character: “;
cin >> inp;
if (inp >= ‘A’)
if (inp <= ‘Z’)
cout << end1 << “Uppercase”;
else if (inp >= ‘a’)
{
if (inp <= ‘z’)
cout << end1 << “Lowercase”;
else
cout << end1 << “Input character > z”;
}
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