Lösung für Tag1

1 files changed, 23 insertions, 0 deletions

diff --git a/src/01a.cpp b/src/01a.cpp
new file mode 100644
index 0000000..1fcc763
--- /dev/null
+++ b/src/01a.cpp
@@ -0,0 +1,23 @@
+#include <algorithm>
+#include <fstream>
+#include <iostream>
+#include <string>
+using namespace std;
+
+int
+main()
+{
+        string  digits{ "0123456789" };
+        fstream input{ "data/01a.txt" };
+
+        int sum = 0;
+        for ( string line; input >> line; ) {
+                auto first = find_first_of(begin(line), end(line), begin(digits), end(digits));
+                auto last  = find_first_of(rbegin(line), rend(line), begin(digits), end(digits));
+
+                auto value = (*first - '0') * 10 + (*last - '0');
+
+                sum += value;
+        }
+        cout << sum << endl;
+}