- C++ Programming Examples
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- C++ Hello World
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- C++ Print Integer
- C++ Add Two Numbers
- C++ Add Sub Mul Div
- C++ Add Digits
- C++ Find Average Perc
- C++ Find Arithmetic Mean
- C++ Sum of n Natural Numbers
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- C++ Area Perimeter of Square
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- C++ Find Simple Interest
- C++ Fahrenheit to Celsius
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- C++ Print Prime Numbers
- C++ Reverse a Number
- C++ Swap Two Numbers
- C++ Print Multiplication Table
- C++ Find Factorial of Number
- C++ Find Factors of Number
- C++ Find HCF & LCM
- C++ Make Calculator
- C++ Count Digits in Number
- C++ Sum of First & Last Digit
- C++ Product of Digits of Number
- C++ Sum of Squares of Digits
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- C++ if else Programs
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- C++ Calculate Student Grade
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- C++ Number Conversion
- C++ Decimal to Binary
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- C++ Pattern Programs
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- C++ Array Programs
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- Find Largest Element in Array
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- C++ Sum of All Elements
- C++ Multiply All Elements
- C++ Element on Even Position
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- C++ Print Even Numbers in Array
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- C++ Count Even/Odd Numbers
- C++ Sum of Even/Odd Numbers
- C++ Count Positive Negative Zero
- C++ Reverse an Array
- C++ Insert Element in Array
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- C++ Merge two Arrays
- C++ Bubble Sort
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- C++ Add Two Matrices
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- C++ Transpose Matrix
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- C++ 3D Array Programs
- C++ String Programs
- C++ Print String
- C++ Find Length of String
- C++ Compare Two Strings
- C++ Copy String
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- C++ Reverse a String
- C++ Delete Vowels from String
- C++ Delete Word from String
- C++ Count Character in String
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- C++ Frequency of Word
- C++ Remove Spaces from String
- C++ Sort a String
- C++ Uppercase to Lowercase
- C++ Lowercase to Uppercase
- C++ Swap Two Strings
- C++ Check Anagram or Not
- C++ Capitalize All Words in String
- C++ Capitalize Specific Character
- C++ Get Numbers from String
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- C++ Append Data in File
- C++ Read & Display File
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- C++ Merge Two Files
- Count Characters, Words in File
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- C++ Days into Years, Months
- Add Two Numbers using Pointer
- C++ Print Fibonacci Series
- Generate Armstrong Numbers
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C++ Program to Make Simple Calculator
In this article, you will learn and get code to create a simple calculator using C++. Here are the list of calculator programs available in this article:
- Simple Calculator Program
- Calculator Program using user-defined Function
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, multiplicatin, and division, depending on the user's choice.
To do the task of calculator, first receive the choice and then any two numbers (if choice is not to exit). Then use the switch case to identify the choice and perform required things as shown in the program given below:
The question is, 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 build and run under Code::Blocks IDE. Here is its sample run:
Now enter your choice say 3, if you want to perform multiplication. After supplying 3 as choice, press
ENTER
key. Here is the output you will see:
Now supply any two numbers say 3.4 and 3 as input. Then press ENTER
key to print
its multiplication result as shown in the snapshot given below:
As you can see, the program again asks to enter the choice to perform the operation again, until user enters 5 as choice to exit from the calculator.
C++ Calculator Program using Function
This program also creates a calculator, but using a user-defined functions such as:
- addFun() to add and returns addition of two numbers passed as its two arguments
- subFun() subtracts two numbers. Second number (argument) gets subtracted from first
- mulFun() multiplies two numbers
- divFun() divides two numbers. First number (argument) gets divided by 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 of previous program.
Same Program in Other Languages
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