How to evaluate multiple increment operators inside printf ?

Printing Variable having Different Form :

#include<stdio.h>
void main()
{
int i=1;
printf("%d %d %d",i,++i,i++);
}

Output :

3 3 1

How ?

• Whenever more than one format specifier [ %d Here] are directly or indirectly related with same variable [i,i++,++i] then firstly evaluate each individual expression in [ <----- ] Direction.
• So Sequence of Evaluation will be -
1. i++
2. ++i
3. i
• Evaluating i++ : While Evaluating [i++] always old value of ” variable i ” is used and new value is used thereafter .[ Here Old value is 1 and new incremented value is 2 ]
• Evaluating ++i : While Evaluating [++i] always new value of ” variable i ” is used and old value is discarded .[ Here Old value is 2 and new incremented value is 3 ]
• Evaluating i : Directly Printing ‘i’

Printing Sequence :

1. i
2. ++i
3. i++