# Answer to Question #27710 in C++ for Mehmil Khan

Question #27710

Write a Simple Calculator Using If Else Statement that prompts the user to Input two Numbers. Then it will Display the Menu for Addition, Subtraction, Multiplication, Division, Square of 1st Number, Cube of 1st Number, Sin, Cos, Tan. After any choice it will Display the Answer

Expert's answer

#include <conio.h>

#include <iostream>

using namespace std;

//main function

int main()

{

int choice=-1;//choice

float firstnumber;

float secondnumber;

cout<<"Enter fisrt number: ";

cin>>firstnumber;

cout<<"Enter second number: ";

cin>>secondnumber;

do{

//Show menu

cout<<"1 - Addition

";

cout<<"2 - Subtraction

";

cout<<"3 - Multiplication

";

cout<<"4 - Division

";

cout<<"5 - Square of 1st Number

";

cout<<"6 - Cube of 1st Number

";

cout<<"7 - Sin 1st Number

";

cout<<"8 - Cos 1st Number

";

cout<<"9 - Tan 1st Number

";

cout<<"0 - Exit";

cout<<"Select one item: ";

cin>>choice;//read one item

float result=0;//result variable

//Show result

if(choice==1){

result=firstnumber+secondnumber;

cout<<"Addition is: "<<result;//Addition

cout<<"

";//new line

}

if(choice==2){

result=firstnumber-secondnumber;

cout<<"Subtraction is: "<<result;//Subtraction

cout<<"

";//new line

}

if(choice==3){

result=firstnumber*secondnumber;

cout<<"Multiplication is: "<<result;//Multiplication

cout<<"

";//new line

}

if(choice==4){

result=firstnumber/secondnumber;

cout<<"Division is: "<<result;//Division

cout<<"

";//new line

}

if(choice==5){

result=firstnumber*firstnumber;

cout<<"Square 1st Number is: "<<result;//Square 1st

Number

cout<<"

";//new line

}

if(choice==6){

result=firstnumber*firstnumber*firstnumber;

cout<<"Cube 1st Number is: "<<result;//Cube 1st Number

cout<<"

";//new line

}

if(choice==7){

result=sin(firstnumber);

cout<<"Sin 1st Number is: "<<result;//Sin 1st Number

cout<<"

";//new line

}

if(choice==8){

result=cos(firstnumber);

cout<<"Cos 1st Number is: "<<result;//Cos 1st Number

cout<<"

";//new line

}

if(choice==9){

result=tan(firstnumber);

cout<<"Tan 1st Number is: "<<result;//Tan 1st Number

cout<<"

";//new line

}

}while(choice!=0);//exit if user enter 0

return 0;//return from function

}

#include <iostream>

using namespace std;

//main function

int main()

{

int choice=-1;//choice

float firstnumber;

float secondnumber;

cout<<"Enter fisrt number: ";

cin>>firstnumber;

cout<<"Enter second number: ";

cin>>secondnumber;

do{

//Show menu

cout<<"1 - Addition

";

cout<<"2 - Subtraction

";

cout<<"3 - Multiplication

";

cout<<"4 - Division

";

cout<<"5 - Square of 1st Number

";

cout<<"6 - Cube of 1st Number

";

cout<<"7 - Sin 1st Number

";

cout<<"8 - Cos 1st Number

";

cout<<"9 - Tan 1st Number

";

cout<<"0 - Exit";

cout<<"Select one item: ";

cin>>choice;//read one item

float result=0;//result variable

//Show result

if(choice==1){

result=firstnumber+secondnumber;

cout<<"Addition is: "<<result;//Addition

cout<<"

";//new line

}

if(choice==2){

result=firstnumber-secondnumber;

cout<<"Subtraction is: "<<result;//Subtraction

cout<<"

";//new line

}

if(choice==3){

result=firstnumber*secondnumber;

cout<<"Multiplication is: "<<result;//Multiplication

cout<<"

";//new line

}

if(choice==4){

result=firstnumber/secondnumber;

cout<<"Division is: "<<result;//Division

cout<<"

";//new line

}

if(choice==5){

result=firstnumber*firstnumber;

cout<<"Square 1st Number is: "<<result;//Square 1st

Number

cout<<"

";//new line

}

if(choice==6){

result=firstnumber*firstnumber*firstnumber;

cout<<"Cube 1st Number is: "<<result;//Cube 1st Number

cout<<"

";//new line

}

if(choice==7){

result=sin(firstnumber);

cout<<"Sin 1st Number is: "<<result;//Sin 1st Number

cout<<"

";//new line

}

if(choice==8){

result=cos(firstnumber);

cout<<"Cos 1st Number is: "<<result;//Cos 1st Number

cout<<"

";//new line

}

if(choice==9){

result=tan(firstnumber);

cout<<"Tan 1st Number is: "<<result;//Tan 1st Number

cout<<"

";//new line

}

}while(choice!=0);//exit if user enter 0

return 0;//return from function

}

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