ex07-04.cpp

来自「数据结构常用算法合集」· C++ 代码 · 共 29 行

//EX07-04.cpp
#include <iostream.h>	//cout,cin
#include <conio.h>		// getch()
float operation(char,float,float);
void main()
{ float a,b;
  char op,yn;
  cout << "a b=";cin>>a>>b;
  do
  { cout << "Enter (+,-,*,/):";
    cin >> op;
    cout << "result="<<operation(op,a,b);
    cout << "\nDo it again?(y/n)";
    cin >> yn;
  } while (yn!='n' && yn!='N');
}
float operation(char op,float a,float b)
{ float t;
  switch (op)
  { case '+': t = a + b; break;
    case '-': t = a - b; break;
    case '*': t = a * b; break;
    case '/': if (b>0) t = a / b; break;
    default : t=0;
  }
  return t;
}