# Programming 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++

Start programming with zero level, Here you will found following basic programs,

- Printing of two number total in C++
- add three number of total given by the user
- multiply any three number
- print three number of average
- All in one find out any two number total,subtraction,multiply and average

## Printing of two number total

#include<iostream.h> #include<conio.h> void main(void) // because function void type so void as argument in function { int num1,num2,sum; // three variable declare cout<<"Enter any two number: "; cin>>num1>>num2; sum = num1+num2; // variable sum hold the total of variable a and b total cout<<"Addition: "<<sum; // printing value of sum(which is total of a and b) getch(); }

OUTPUT:-Enter any two number: 4 5 Addition: 9

**explanation:**

In the program, first we have declare three int type variables,

`int num1,num2,sum;`

where variable num1 and variable num2 will take input from the user while variable sum will store the total of these two variables.

`sum = num1+num2;`

such as,

But, if we want to add three numbers instead of two.

Here is another example where we add three number given by the user.

## add three number of total given by the user

#include<iostream.h> #include<conio.h> void main(void) { int num1,num2,num3,sum; cout<<"Enter any four number: "; cin>>num1>>num2>>num3; sum = num1+num2+num3; cout<<"\nTotal: "<<sum; // cout<<"Total: "<<num1+num2+num3; // also work getch(); }

OUTPUT:-Enter any three number: 4 3 5 Total: 12

**explanation:**

In the program, first we have declare four int type variables,

`int num1,num2,num3,sum;`

where variables num1, num2 and num3 will take input from the user while variable sum will store the total of these two variables.

`sum = num1+num2+num3;`

means,

`sum = 3+4+5`

such as,

The above both program shows that we have to declare as many variables as we need to total. Meaning if we want to total two numbers, then we have to declare two variables first and if we want to total 3 numbers, first we have to declare three variables.

## multiply any three number

#include<iostream.h> #include<conio.h> int main() { int a,b,c,mul; cout<<"Enter any three number: "; cin>>a>>b>>c; mul = a*b*c; // multiply variables a,b and c. and store result variable mul cout<<"Total: "<<mul; // print variable mul value getch(); return 0; // using return because function main() is not void type }

OUTPUT:-Enter any three number: 4 5 3 Multiply: 60

## To find out any three number average

#include<iostream.h> #include<conio.h> int main() { int a,b,c,av; cout<<"Enter any three number: "; cin>>a>>b>>c; av = (a+b+c)/3; // store average of a,b and c cout<<"\nAverage: "<<av; // print variable av value getch(); return 0; }

OUTPUT:- Enter any three number: 3 4 2 Average: 3

Here is another one program,

Here is another program where we declare two variable and used them with different operation,

In a way, we can say that all the tasks performed in the above program are given in a single program.

## All in one find out any two number total,subtraction ,multiply and average

#include<iostream.h> #include<conio.h> void main(void) // no value return so void as argument(optional) { clrscr(); // to clear previous screen int num1,num2,sub,sum,mul,av; cout<<"Enter any two number: "<<endl; // endl used for next line like enter button cin>>num1>>num2; // storing result one by one of variable a and b sum = num1+num2; sub = num1-num2; mul = num1*num2; av = sum/2; //printing values one by one cout<<"\nAddition: "<<a<<"+"<<b<<" = "<<sum; cout<<"\nSubstrac: "<<a<<"-"<<b<<" = "<<sub; cout<<"\nMultiply: "<<a<<"x"<<b<<" = "<<mul; cout<<"\nAverage : ("<<a<<"/"<<b<<")/2 = "<<av; getch(); }

OUTPUT:-Enter any two number: 4 5 Addition: 4+5 = 9 Substrac: 4-5 = -1 Multiply: 4x5 = 20 Average : (4/5)/2 = 4

**Explanation:-**

In the program, firstly we have declared 6 variables,

`int num1,num2,sum,mul,av;`

Where variables num1 and num2 will store user input. Suppose user input is 4 and 5 then,

num1 = 4 num2 = 5

and other variables sum,mul,av store their result.such as,

sum = a + b; sub = a - b; mul = a * b; av = sum /2;

and user input is 4 and 5 then,

sum = 4 + 5; sub = 4 - 5; mul = 4 * 5; av = 4 + 5 /2

after all we print each variables value.

Thus the program will successfully execute.

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