簡單計算器是執行一些基本運算的計算器,例如「 」、「-」、「*」、「/」。計算器可以快速完成基本操作。我們將使用 switch 語句來製作一個計算器。
Operator − ‘+’ => 34 + 324 = 358 Operator − ‘-’ => 3874 - 324 = 3550 Operator − ‘*’ => 76 * 24 = 1824 Operator − ‘/’ => 645/5 = 129
#include <iostream< using namespace std; int main() { char op = '+'; float a = 63, b= 7; // cout << "Enter operator either + or - or * or /: "; // cin >> op; cout<<"The operator is "<<op<<endl; // cout << "Enter two operands: "; // cin>> a >> b; cout<<"a = "<<a<<" b = "<<b<<endl; switch(op) { case '+': cout <<"Sum of"<<a<<"and"<<b<<"is"<< a+b; break; case '-': cout <<"Difference of"<<a<<"and"<<b<<"is"<<a-b; break; case '*': cout <<"Product of"<<a<<"and"<<b<<"is"<<a*b; break; case '/': cout <<"Division of"<<a<<"and"<<b<<"is"<<a/b; break; default: // If the operator is other than +, -, * or /, error message is shown cout << "Error! operator is not correct"; break; } return 0; }
The operator is + a = 63 b = 7 Sum of63 and 7 is 70
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