Question

This code is what I've already written. It satifies the first example in my instructions but I don't know where or how to fit the if, if-else statements and among other things that I might be leaving out that I need to complete the code and comply with my instructions. Please help me. Thanks!

Answer 1

Program:

#include<iostream>

#include<limits>

#include <cmath>

using namespace std;

int main() {

char OP; // variable declaration

float num1, num2; // variable declaration

cout<<"Enter left operand:";

cin>>num1;

if(cin.fail())

{

cin.clear();

cin.ignore(numeric_limits<streamsize>::max(),'\n');

cout<<"Invalid left operand."<<endl;

return 0;

}

cout<<"Enter operation:";

cin>>OP;

if(OP!='B'&&OP!='b'&&OP!='|')

{

cout<<"Enter right operand:";

cin>>num2;

if(cin.fail())

{

cin.clear();

cin.ignore(numeric_limits<streamsize>::max(),'\n');

cout<<"Invalid right operand."<<endl;

return 0;

}

}

switch (OP) // check the operator

{

case '+' : // if operation +

cout<<"Result = "<<num1+num2<<endl;

break;

case 'A' : // if operation +

cout<<"Result = "<<num1+num2<<endl;

break;

case 'a' : // if operation +

cout<<"Result = "<<num1+num2<<endl;

break;

case '-': // if operation -

cout<<"Result = "<<num1-num2<<endl;

break;

case 'S': // if operation -

cout<<"Result = "<<num1-num2<<endl;

break;

case 's': // if operation -

cout<<"Result = "<<num1-num2<<endl;

break;

case '*': // if operation *

cout<<"Result = "<<num1*num2<<endl;

break;

case 'm': // if operation *

cout<<"Result = "<<num1*num2<<endl;

break;

case 'M': // if operation *

cout<<"Result = "<<num1*num2<<endl;

break;

case '/': // if operation /

cout<<"Result = "<<num1/num2<<endl;

break;

case 'D': // if operation /

cout<<"Result = "<<num1/num2<<endl;

break;

case 'd': // if operation /

cout<<"Result = "<<num1/num2<<endl;

break;

case 'B': // if operation /

cout<<"Result = "<<abs(num1)<<endl;

break;

case 'b': // if operation /

cout<<"Result = "<<abs(num1)<<endl;

break;

case '|': // if operation /

cout<<"Result = "<<abs(num1)<<endl;

break;

default:

cout<<"Unknown operation: "<<endl;

break;

}

return 0;

}

Output:

null