Assignment, equality comparison problem – Computer Sir Ki Class


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Solved Problem #CPP#2314 siteicon   siteicon   siteicon  

Problem Statement - Assignment, equality comparison problem

Find the output of the program given below. Assume all relevant header files are included

int main( )
  int a,b,c=101,d=102;
  return 0 ;


TC++ #2314


Run Output



int a,b,c=101,d=102;
Here a and b do not have initial values and c and d have values 101 and 102 respectively.

Here left hand side inside will be evaluated first where the value of d is assigned to c. So c will leave its original value and will be assigned the value of d which is 102. So from left hand side c will contain 102. Finally with the last assignment operation a will contain the new value of c which will be 102.

This will print 102 as explained above.

Here the operator inside bracket on the right hand side is the comparison operator for equality check. Since c has already be assigned 102 in the previous operation, so it will become equal to d which was originally set for 102. Which means that comparison operation will return true status. In c++ if comparison evaluates to true, it is stored as 1 if equated to an integer storage. So b will be 1.

This will print 1 as explained above.

Common Errors

  • The modification of value of c to value of d in first expression is often missed by students.
  • The watch over difference between = and == operator is essential for this kind of programs.


sunmitra| Created: 6-Jan-2018 | Updated: 18-Dec-2018|

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