Created the base_2_to_10.cpp

base_2_to_10.cpp

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+#include <iostream>
+#include <string>
+#include <vector>
+
+using namespace std;
+
+int main() {
+    cout << "Bitte gib deinen Base2 String ein: ";
+    string input;
+    cin >> input;
+
+    vector<int> bits;
+
+    for (char c : input) {
+        int bit = c - '0';
+        bits.push_back(bit);
+
+        if (!(bit == 0 || bit == 1)) {
+            cout << "Du kannst in Base2 nur 1 oder 0 verwenden. Bitte versuche es erneut." << endl;
+            return main();
+        }
+    }
+
+
+    int num = 0;
+
+    int modifier = 1;
+    for (auto i = bits.begin(); i < bits.end(); i++) {
+        num += modifier * bits[bits.end()- i - 1];
+        modifier *= 2;
+    }
+
+    cout << input << " lautet als Dezimalzahl " << num;
+
+
+    return 0;
+}