--Originally published at The Talking Chalk

The Task

Create a program with a function that returns the factorial of the number given in the parameter.

The Process

The Code

#include <iostream>
#include <math.h>
using namespace std;

int main()
{
float number[10], sum, average, variance, sdev;
cout<<“Give ten numbers.”<<endl;
for(int counter = 0; counter<10; counter++)
{
cin>>number[counter];
sum+=number[counter];
average=sum/10;
variance+=pow(number[counter]-average, 2)/10;
sdev=sqrt(variance);
}
cout<<“The sum of the given numbers is: “<<sum<<endl;
cout<<“The average of the given numbers is: “<<average<<endl;
cout<<“The standard deviation of the given numbers is: “<<sdev<<endl;
return 0;
}

The topics

#For

#Arrays/vectors

--Originally published at The Talking Chalk

The Task

Create a program with a function that returns the factorial of the number given in the parameter.

The Process

The Code

#include <iostream>
using namespace std;

int factorial (int num)
{
int counter=1, factorial=num;//set a counter, set factorial as the given number
do
{
factorial*=counter; //multiply factorial per all the numbers counter can have that are smaller than num
counter+=1;
}
while(counter<num);//Do while counter is smaller than um
return factorial;
}

int main()
{
cout<<factorial(5)<<endl;
return 0;
}

The topics

#While and do while

--Originally published at The Talking Chalk

The Task

Create a program that asks for two integer values and passes them to functions that return their sum, substractions, multiplication, division and remainder.

The Process

The Code

#include <iostream>
using namespace std;

int sum(int first, int second)
{
return first + second;
}
int subst(int first, int second)
{
return first – second;
}
int mult(int first, int second)
{
return first * second;
}
int div(int first, int second)
{
return first / second;
}
int rem(int first, int second)
{
return first % second;
}
int main()
{
cout<<sum(6,9)<<endl<<subst(6,9)<<endl<<mult(6,9)<<endl<<div(6,9)<<endl<<rem(6,9)<<endl;
return 0;
}

The topics

#Calling functions

#Creating functions

--Originally published at The Talking Chalk

The Task

Create a program that asks for two integer values and prints the sum of all integer numbers between these values.

The Process

The Code

#include <iostream>
using namespace std;

int main ()
{
int big, low, sum=0;
cout<<“Give a number”<<endl;
cin>>low; //User gives value for low
cout<<“Now give a bigger number”<<endl;
cin>>big; //User gives value for big

do
{
low=low+1; //Sums 1 to low, so this low is a number between the original low and big
sum+=low; //Sums the value of low to sum
}
while(low<big); //the process repeats until low is equal to big, so sum will be the sum of all number between low and big
cout<<“The sum of the numbers between the two given is equal to “<<sum<<endl;
return 0;
}

The topics

#Basic output

#Basic input