C++ question ihave problem with it

[ahmed12347]

Koko has found one more paper, but this time there is an mathematical expression written on it.

Can you help Koko verify the expression?

If the expression is right print "Yes", Otherwise print the right answer of the expression.

Input
You will be given a number A followed by a sign S, then another number B followed by an equal sign '=' then another number R the result on the paper (0  ≤  A, B ≤  100),(  - 105  ≤  R  ≤  105), S can be ('+', '-', '*') without the quotation.

Output
Output either "Yes" (without the quotation) or the right answer depending on the statement.

[Luuk]

Half the answer is already in the question.

"You will be given a number A "
int A;
"followed by a sign S"
char S;
" then another number B followed by an equal sign '='"
int B;
char X;
"then another number R the result"
int R;
….