Helping Loic with his homework.

loic.cpp

#include <iostream>
using namespace std;

int is_inside(int a[])
{
	int to_compare, flag; //the number to compare
						  // followed by the "is inside" flag, yes or no (1, NULL)
	flag = 0; //first it's assumed that the number to_compare to the array elements is non-existent
	cout << "Enter a value to check for: " << endl;
	cin >> to_compare;  //set to_compare to user input

	for(int i = 0; i <= (sizeof a); i++)  //start at the beginning of the array; iterate until the maximum sizeof the array is reached
		if(to_compare == a[i])  //compare the number to_compare to the current array element, and if they're the same
			flag = 1;			//  then the flag is up (on; 1; true; yes), which means the number was found
		else
			continue;  //or else, just continue to loop
	if(flag == 1) cout << "It's there." << endl;  //After the iteration through the array is complete, check the state of the flag
	else cout << "Non-existent." << endl;
		
	return 0; //return successfully
}
int main()
{
	int aTest[] = { 1, 2, 3, 4, 5 };  //put some dummy values in a test array
	is_inside(aTest);  //pass the test array of dummy values to your function is_inside()
	system("pause");  //this is here to pause the console window before exiting.  Not needed.
	return 0;  //return success
}