if $($operation $==\text{'}+\text{'})$;

cout $<<$ op$1<<"+"<<$ op$2<<"="<<$ op$1+$ op$2<<$ endl;

else if $($operation $==\text{'}-\text{'})$

cout $<<$ op$1<<"-"<<$ op$2<<"="<<$ op$1-$ op$2<<$ endl;

else if $($operation $==\text{'}*\text{'})$

cout $<<$ op$1<<"*"<<$ op$2<<"="<<$ op$1*$ op$2<<$ endl;

else if $($operation $==\text{'}/\text{'})$

$\{$