Escriba un C ++ el programa que toma dos operandos y una operación y salidas el resul

[juantxo84]

por que no me hace la resta?

#include <iostream>

using namespace std;

int main() {
float firstnum; float seconnum;
string operation;
float plus ;float minus ;float mul ; float div ;
plus = '+';
minus = '-';
mul = '*';
div = '/';

cout << "Introduce operacion ";
cin >> firstnum >> operation >> seconnum;

if (operation == "+"||"plus" ) {
plus = firstnum + seconnum;
cout << "The sum is: " << plus << endl;
return 0;
}
else (operation == "-" || "minus");
minus = firstnum - seconnum;
cout << "the minus is: " << minus << endl;
}