Change string to function

Question

is there any code in c++ that execute string as function for example

int main()
{
float b;
string a="b=sin(90)*exp(2)*pow(2,5);";
exe(&a);
cout《b;
}
I expect exe function that execute string a as a function is there exisying such a function???

Answer 1

make a function that returns what u said

Answer 2

:-(