using formula in C++
EXERCISE
- Programming in C++
- store a full length of name in C++
- find out in given number, even or odd in C++
- using formula in C++
- arithmetical progression using C++
- found a given number is positive or negative in C++
- find a largest number in any three given number
- for-loop
- while-loop
- do-while loop
- add array elements total in C++
- Add different array element with each other
- structure programs in C++
- function exercise
- file handling programs in C++
In this page, two programs are given. In which real world formulas have been used,
a simple demonstration to find out simple interest
In this program, we will find simple interest
As we know that we use its formula to find out the simple interest. like
si = (principle*rate*time/100);
In this formula, we have input period, rate and time from the user.
Here is the program,
#include<iostream.h>
#include<conio.h>
void main()
{
clrscr();
int si,principal,rate,time;
cout<<"Enter Principal, rate, time: ";
cout<<"\nPrincipal: "; cin>>principal;
cout<<"Rate(in %) : "; cin>>rate;
cout<<"Time(days) : "; cin>>time;
si = (principal*rate*time/100);
cout<<"Simple interest: "<<si;
getch();
}
OUTPUT:-
Enter Principal, rate, time:
Principal : 100
Rate(in %) : 5
Time(days) : 2
Simple interest: 10
In the program, we have declared three variables. such as,
int principal, rate, time, si
Where, the user has been asked for input for variables period, rate and time. suppose these input are
principal = 100 rate = 5 time = 2
and variable si store these variable’s result,
si = (principal*rate*time)/100
means,
si = (100*5*2)/100
And in the last statement, the value of variable si is printed which is 10.
Thus program is executed successfully
Here is another one program,
Convert Fahrenheit degree to Celsius
in this program we convert fahrenheit degree to celsius
Like the program above, we will use the formula here
celsius = (farhenheit-32)*5/9;
Here is the program,
#include<iostream.h> #include<conio.h> void main() { clrscr(); int farhenheit,celsius; cout<<"Enter Fahrenheit Degree: "; cin>>farhenheit; celsius = (farhenheit-32)*5/9; // using formula cout<<"\nIn Celsius: "<<celsius; getch(); }
OUTPUT:- Enter Fahrenheit degree: 23 In Celsius: -5
Explanation:
In the program, we have asked the user to enter the degree farhenheit. Which will be stored in the variable farhenheit, such as,
farhenheit = 23
After this we have used the formula to get celsius degree, so
celsius = (23-32)*5/9
And in the last statement, the value of the variable calsius is printed.
Similarly in C++, we can also create many more programs where we can use the formulas.