What is the difference between prefix and postfix operators?

Question

The following code prints a value of 9. Why? Here return(i++) will return a value of 11 and due to --i the value should be 10 itself, can anyone ex

Answer 1

There are two examples illustrates difference

int a , b , c = 0 ; 
a = ++c ; 
b = c++ ;
printf (" %d %d %d " , a , b , c++);

• Here c has value 0 c increment by 1 then assign value 1 to a so value of a = 1 and value of c = 1

• next statement assiagn value of c = 1 to b then increment c by 1 so value of b = 1 and value of c = 2

• in printf statement we have c++ this mean that orginal value of c which is 2 will printed then increment c by 1 so printf statement will print 1 1 2 and value of c now is 3

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int a , b , c = 0 ; 
a = ++c ; 
b = c++ ;
printf (" %d %d %d " , a , b , ++c);

• Here in printf statement ++c will increment value of c by 1 first then assign new value 3 to c so printf statement will print 1 1 3