Here is a very simple calculator.
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// switch/infix-calc.cpp - Simple calculator. // Illustrates switch and continue statements. // Not robust (eg, doesn't check for division by 0). // Fred Swartz 10 Aug 2003 #include <iostream> #include <iomanip> using namespace std; int main() { int left, right; // Operands char oper; // Operator int result; // Resulting value while (cin >> left >> oper >> right) { switch (oper) { case '+': result = left + right; break; case '-': result = left - right; break; case '*': result = left * right; break; case '/': result = left / right; break; default : cout << "Bad operator '" << oper << "'" << endl; continue; // Start next loop iteration. } cout << result << endl << endl; } return 0; } |