chore: add cprNumber program

this one was a bit of a pain working between data types

.vscode/settings.json

@@ -1,6 +1,7 @@
 {
     "files.associations": {
         "iostream": "cpp",
-        "*.tcc": "cpp"
+        "*.tcc": "cpp",
+        "ostream": "cpp"
     }
 }

cprNumber/main.cpp

@@ -0,0 +1,22 @@
+#include <iostream>
+#include <string>
+using namespace std;
+
+int main(){
+    string cprNum = "";
+    cin >> cprNum;
+    cprNum  = cprNum.erase(cprNum.find('-'), 1);
+    int sum = 0;
+    int con = 0;
+    int mult[] = {4,3,2,7,6,5,4,3,2,1};
+    for (int i = 0; i< cprNum.length(); ++i){
+        con = cprNum[i] - '0';
+        sum += con * mult[i];
+    }
+    if (sum % 11 == 0){
+        cout << "1" << endl; 
+    }
+    else{
+        cout << "0" << endl;
+    }
+}