A gpt/2025-10-13/quersumme.c

@@ -0,0 +1,36 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <limits.h>
+
+
+static unsigned int digitSum(int* n) { 
+    unsigned int num = abs(*n);
+    unsigned int sum = 0;
+    while (num != 0) {
+        sum = sum + num % 10;
+        num = num/10;
+    }
+    return sum;
+}
+
+static unsigned int digits (int* n) {
+    unsigned int num = abs(*n);
+    unsigned int x, i;
+    for (x=10, i=1; ; x*=10, i++) {
+        if (num < x)
+            return i;
+        if (x > INT_MAX/10)
+            return i+1;
+    }
+}
+
+int main() {
+
+    int inputNum;
+
+    printf("Type a number: \n");
+    scanf("%d", &inputNum);
+    printf("Number of digits: %d\nDigit sum: %d\n\n", digits(&inputNum), digitSum(&inputNum));
+
+    return 0;
+}