- C++ Programming Examples
- C++ Programming Examples
- C++: Hello World
- C++: Get Input
- C++: Print Integer
- C++: Add two numbers
- C++: Add, Sub, Multiply, Div
- C++: Add Digits
- C++: Find Average and Percentage
- C++: Find Arithmetic Mean
- C++: Sum of n Natural Numbers
- C++: Sum of n Numbers
- C++: Square's Area and Perimeter
- C++: Rectangle's Area and Perimeter
- C++: Triangle's Area and Perimeter
- C++: Area and Circumference
- C++: Find Simple Interest
- C++: Fahrenheit to Celsius
- C++: Celsius to Fahrenheit
- C++: Print Prime Numbers
- C++: Reverse a Number
- C++: Swap Two Numbers
- C++: Print Multiplication Table
- C++: Find Factorial of a Number
- C++: Find Factors of a Number
- C++: Find HCF and LCM
- C++: Create a Calculator
- C++: Count Digits in a Number
- C++: First and Last Digit Sum
- C++: Product of Number Digits
- C++: Sum of Squares of Digits
- C++: Interchange Digits of Number
- C++ if-else Programs
- C++: Check Even or Odd
- C++: Check Prime or Not
- C++: Check Alphabet or Not
- C++: Check Vowel or Not
- C++: Check Leap Year or Not
- C++: Check Reverse equals Original
- C++: Check Perfect Number
- C++: Check Palindrome or Not
- C++: Check Armstrong or Not
- C++: Divisibility Test
- C++: Find Labor Wage
- C++: Find Discounted Price
- C++: Find Shipping Charge
- C++: Find Telephone Bills
- C++: Calculate Student Grade
- C++: Largest of Two Numbers
- C++: Largest of Three Numbers
- C++ Number Conversion
- C++: Decimal to Binary
- C++: Decimal to Octal
- C++: Decimal to Hexadecimal
- C++: Binary to Decimal
- C++: Binary to Octal
- C++: Binary to Hexadecimal
- C++: Octal to Decimal
- C++: Octal to Binary
- C++: Octal to Hexadecimal
- C++: Hexadecimal to Decimal
- C++: Hexadecimal to Binary
- C++: Hexadecimal to Octal
- C++ Pattern Programs
- C++: Pattern Programs
- C++: Print Diamond Pattern
- C++: Print Floyd's Triangle
- C++: Print Pascal's Triangle
- C++ Array Programs
- C++: 1D Array Program
- C++: Linear Search
- C++: Binary Search
- C++: Largest Element in an Array
- C++: Smallest Element in an Array
- C++: Find Second Largest Element
- C++: Find Second Smallest Element
- C++: Sum of All Elements
- C++: Multiply All Elements
- C++: Element in Even Position
- C++: Element in Odd Position
- C++: Print Even Numbers in Array
- C++: Print Odd Numbers in Array
- C++: Count Even or Odd Numbers
- C++: Sum of Even or Odd Numbers
- C++: Count Positive, Negative, Zero
- C++: Reverse an Array
- C++: Insert an Element
- C++: Delete an Element
- C++: Merge two Arrays
- C++: Bubble Sort
- C++: Selection Sort
- C++: Insertion Sort
- C++: Common Elements
- C++: 2D Array Programs
- C++: Add Two Matrices
- C++: Subtract Two Matrices
- C++: Transpose Matrix
- C++: Multiply Two Matrices
- C++: 3D Array Programs
- C++ String Programs
- C++: Print String
- C++: Find String Length
- C++: Compare Two Strings
- C++: Copy String
- C++: String Concatenation
- C++: Reverse a String
- C++: Delete Vowels from a String
- C++: Delete a Word from a String
- C++: Count Characters in a String
- C++: Count Words in a String
- C++: Frequency of Words
- C++: Remove Spaces from Strings
- C++: Sort a String
- C++: Uppercase to Lowercase
- C++: Lowercase to Uppercase
- C++: Swap Two Strings
- C++: Check the Anagram or Not
- C++: Capitalize All Words in a String
- C++: Get Numbers from a String
- C++ File Programs
- C++: Read a File
- C++: Write Content to a File
- C++: Append Data to a File
- C++: Read and Display File
- C++: Copy a File
- C++: Merge Two Files
- Count Characters in a File
- C++: Capitalize Every Word
- C++: List Files in Directory
- C++: Delete a File
- C++: Encrypt and Decrypt a File
- C++ Misc Programs
- C++: Print ASCII Value
- C++: Add Binary Numbers
- C++: Generate Random Numbers
- C++: Print a Smiling Face
- C++: Days into Years and Months
- C++: Add Two Numbers using Pointer
- C++: Print Fibonacci Series
- C++: Generate Armstrong Numbers
- C++: Find nCr and nPr
- C++: Get IP Address
- C++: Print Date and Time
- C++: Shutdown and Restart Computer
- C++ Programming Tutorial
- C++ Tutorial
C++ Program to Make a Simple Calculator
In this article, you will learn and get code to create a simple calculator using C++. Here is the list of calculator programs available in this article:
Make a Calculator in C++
The program given below creates a simple calculator in C++ programming that performs four basic mathematical operations, such as addition, subtraction, multiplication, and division, depending on the user's choice.
To do the task of the calculator, first receive the choice and then any two numbers (if the choice is not to exit). Then, as shown in the program below, use the switch case to identify the choice and perform the necessary actions:
The question is, "How do I write a calculator program in C++?" Here is its answer:
#include<iostream> using namespace std; int main() { float numOne, numTwo, res; int choice; do { cout<<"1. Addition\n"; cout<<"2. Subtraction\n"; cout<<"3. Multiplication\n"; cout<<"4. Division\n"; cout<<"5. Exit\n\n"; cout<<"Enter Your Choice(1-5): "; cin>>choice; if(choice>=1 && choice<=4) { cout<<"\nEnter any two Numbers: "; cin>>numOne>>numTwo; } switch(choice) { case 1: res = numOne+numTwo; cout<<"\nResult = "<<res; break; case 2: res = numOne-numTwo; cout<<"\nResult = "<<res; break; case 3: res = numOne*numTwo; cout<<"\nResult = "<<res; break; case 4: res = numOne/numTwo; cout<<"\nResult = "<<res; break; case 5: return 0; default: cout<<"\nWrong Choice!"; break; } cout<<"\n------------------------\n"; }while(choice!=5); cout<<endl; return 0; }
This program was built and runs under the Code::Blocks IDE. Here is its sample run:
Now enter your choice, say 3, if you want to perform multiplication. After entering "3" as a selection, press the ENTER key. Here is the output you will see:
Now supply any two numbers, say 3.4 and 3, as input. Then press the ENTER key to print its multiplication result, as shown in the snapshot given below:
As you can see, the program again asks for the choice to perform the operation again, until the user enters 5 as the choice to exit the calculator.
Calculator program in C++ using a function
This program also creates a calculator, but using user-defined functions such as:
- addFun() is a function that adds and returns the sum of two numbers passed as arguments.
- subFun() subtracts two numbers. The second number (argument) gets subtracted from the first.
- mulFun() multiplies two numbers.
- divFun() divides two numbers. The first argument gets divided by the second.
Now let's have a look at the program:
#include<iostream> using namespace std; float addFun(float, float); float subFun(float, float); float mulFun(float, float); float divFun(float, float); int main() { float numOne, numTwo, res; int choice; do { cout<<"1. Addition\n"; cout<<"2. Subtraction\n"; cout<<"3. Multiplication\n"; cout<<"4. Division\n"; cout<<"5. Exit\n\n"; cout<<"Enter Your Choice(1-5): "; cin>>choice; if(choice>=1 && choice<=4) { cout<<"\nEnter any two Numbers: "; cin>>numOne>>numTwo; } switch(choice) { case 1: res = addFun(numOne, numTwo); cout<<"\nResult = "<<res; break; case 2: res = subFun(numOne, numTwo); cout<<"\nResult = "<<res; break; case 3: res = mulFun(numOne, numTwo); cout<<"\nResult = "<<res; break; case 4: res = divFun(numOne, numTwo); cout<<"\nResult = "<<res; break; case 5: return 0; default: cout<<"\nWrong Choice!"; break; } cout<<"\n------------------------\n"; }while(choice!=5); cout<<endl; return 0; } float addFun(float a, float b) { return (a+b); } float subFun(float a, float b) { return (a-b); } float mulFun(float a, float b) { return (a*b); } float divFun(float a, float b) { return (a/b); }
This program produces the same output as the previous program.
The same program in different languages
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