First Exercise

Informatik_I/Examples/Week_1/README.md

@@ -0,0 +1,13 @@
+# Task
+
+Write a program which reads in an integer a larger than `1000` and outputs its last three digits. For example, if `a=14325`, the output should be `3 2 5`.
+
+_Hint_: You need to use integer division and modulo operators.
+
+# Input
+
+An integer larger than `1000`.
+
+# Output
+
+Last three digits separated by spaces.

Informatik_I/Examples/Week_1/main.cpp

@@ -0,0 +1,22 @@
+#include <iostream>
+
+int main() {
+
+  int a;
+  std::cin >> a; // get input of for a
+
+  if (a >= 1000) {  // check if input is greater than 1000
+    int b = a % 10; // get last digit
+    a /= 10;
+    int c = a % 10; // get second digit
+    a /= 10;
+    int d = a % 10; // get first digit
+
+    std::cout << d << " " << c << " "
+              << b; // output first, second, and last digit
+  } else {          // if input not greater than 1000 return 0
+    return 0;
+  }
+
+  return 0;
+}