Variable increment and decrement in c/c++

· ++/-- operators there statement
a) Operand can come before or after the operator
b) In the equation it is apply only to the right sight not left sight :x=a++; not x++=a;
second equation will give produce error Lvalue required
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1. printf(“%d”,a++ ): first it will print a current value , if there is next printf statement or variable is occur in any expression then it will increase there variable value a.·
2. printf(“%d”,--a ): first it will print a current value , if there is next printf statement or variable is occur in any expression then it will decrease there variable value a.·
3. printf(“%d”,++a ): it will increase the value a;·
4. printf(“%d”,--a ): it will decrease the value a;