Do you know how to find if an integer is in one array?

Question

I want to know is int x is in one of three next arrays: Arr1, Arr2, Arr3. These arrays have values so If I type cin>> x; I want to kniw if x is part of Arr1, 2 or 3. I tried creating arrays of 0's 1's and 2's but I realized I have to learn more...

Answer 1

you mean searching right. Maybe my code makes it clear for you :
https://code.sololearn.com/cCc4wly5hiDh/?ref=app

Answer 2

bool isInArray(int x, int *arr, int size)
{
for (int i = 0; i < size; i++) {
if (arr[i] == x) return true;
}
return false;
}

int main()
{
int arr[100];

int arrSize = (sizeof(arr)/sizeof(*arr));

for (int i = 0; i < arrSize; i++) {
arr[i] = i;
}

int a;
cin >> a;

bool aIsInArray = isInArray(a, arr, arrSize);

cout << a << (aIsInArray ? " is " : " isn't ") << "in arr" << endl;

return 0;
}