Please help me to understand about prefix, postfix of increment and decrement operators with simple example..?

Answer 1

Examples:
int x = 0;
cout << ++x * 5 << endl;
cout << x;

//Output:
//5
//1

int y = 0;
cout << y++ * 5 << endl;
cout << y;

//Output:
//0
//1

Answer 2

Increment operator does 2 things:
~Increments variable value by 1
~Returns variable value for other operations to use

Difference between prefix and postfix is that which one of those 2 tasks is done first.

++x:
Firstly increments x's value by 1,
Secondly it returns x's (new) value for other operations to use.

x++:
Firstly returns x's (original) value for other operations to use.
Secondly it increments x's value by 1.

Decrement operator works very similarly to increment operator, but instead of adding 1 it subtracts 1.
An advantage of increment and decrement operators is that you can increment or decrement variable value while you use the variable in calculations.

Answer 3

My doubt cleared Seb TheS
Thank U