Make a simple calculator. Display and perform the following functionality.
Scientific Calculator
1. Press 1 for Subtraction
2. Press 2 for average of 3 numbers
3. Press 3 for cube of number
4. Press 4 to print the factorial of number
5. Press 5 to print the Fibonacci series
6. Press 6 for square of number
code :
#include <iostream>
#include<cmath>
using namespace std;
int main()
{
char choice;
cout << "Press 1 for Subtraction"<<endl;
cout << "Press 2 for average of 3 numbers"<<endl;
cout << "Press 3 for cube of number"<<endl;
cout << "Press 4 to print the factorial of number"<<endl;
cout << "Press 5 to print the Fibonacci series"<<endl;
cout << "Press 6 for square of number"<<endl;
cin >> choice;
switch(choice) {
case'1':{
float n1, n2;
cout<<"Enter two numbers"<<endl;
cin >>n1 >> n2;
cout <<"substraction of two numbers="<< n1-n2<<endl<<endl;
break;
}
case'2':{
float n3,n4,n5,Add,Average;
cout<<"Enter three number for average"<<endl;
cin >> n3 >> n4 >> n5;
Add=n3+n4+n5;
cout<<"Average of three numbers is="<<Add/3<<endl<<endl;
break;}
case'3':{
double n6;
cout<<"Please enter a number to find out cube"<<endl;
cin >>n6;
cout<<"cube of number is="<<n6*n6*n6<<endl<<endl;
break;}
case'4':{
int n,factorial=1;
cout<<"Enter number for finding factorial"<<endl;
cin>>n;
for (int i=1;i<=n;i++){
factorial *=i;
}
cout <<"factorial of number is="<< factorial<<endl;
break;
}//case 4
case'5':{
int n,First=0,Second=1,Third;
cout << "Enter any number";
cin >> n;
for (int i = 0; i < n; i++) {
cout << First << endl;
Third=First + Second;
First = Second;
Second= Third;
}//for loop
break;
}
case'6':
{
int num,squar;
cout<<"enter number for square"<<endl;
cin>>num;
squar=num*num;
cout<<"square of number is="<<squar<<endl;
}
}
system("pause");
return 0;
}
output:
Press 1 for Subtraction
Press 2 for average of 3 numbers
Press 3 for cube of number
Press 4 to print the factorial of number
Press 5 to print the Fibonacci series
Press 6 for square of number
1Enter two numbers
2
4
substraction of two numbers=-2
Press 1 for Subtraction
Press 2 for average of 3 numbers
Press 3 for cube of number
Press 4 to print the factorial of number
Press 5 to print the Fibonacci series
Press 6 for square of number
2
Enter three number for average
6
7
8
Average of three numbers is=7
Press 1 for Subtraction
Press 2 for average of 3 numbers
Press 3 for cube of number
Press 4 to print the factorial of number
Press 5 to print the Fibonacci series
Press 6 for square of number
3
Please enter a number to find out cube
3
cube of number is=27
Press 1 for Subtraction
Press 2 for average of 3 numbers
Press 3 for cube of number
Press 4 to print the factorial of number
Press 5 to print the Fibonacci series
Press 6 for square of number
5
Enter any number3
0
1
1
Press 1 for Subtraction
Press 2 for average of 3 numbers
Press 3 for cube of number
Press 4 to print the factorial of number
Press 5 to print the Fibonacci series
Press 6 for square of number
6
enter number for square
6
square of number is=36
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