Cours:CodeblocksFonctions

Factorielle

#include <iostream>
using namespace std;

int factorielle(int n)
{
	int res;
	if (n>1)	res = factorielle(n-1)*n;
		else	res = 1;
	return res;
}

int main()
{
	int n, res=1;
        for(n=1;n<=7;n++)
        {
	  res = factorielle(n);
          cout <<n<<"!="<<res<<endl;
        }

        return 0;
}

Racine

#include <iostream>

using namespace std;

float sqrt(float a)
{
	float u=1;
	do
	{
		u=0.5*(u+a/u);
	}while(((u*u-a)<-0.001)||((u*u-a)>0.001));
	return u;
}

int main()
{
	float n=0;
    cout << "saisir n" << endl;
    cin>>n;
	cout<<"sqrt("<<n<<") = "<<sqrt(n)<<endl;
	return 0;
}