refactor various files

S1/GdCP/uebung/a01-testing.c

@@ -0,0 +1,28 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+int strclean(char *t);
+
+int main(int argc, char *argv[]) {
+  
+ if (argc != 2) {
+    printf("USAGE: %s <string>\n", argv[0]);
+    return 0;
+  }
+
+  char *s = argv[1];
+  
+  if (s == NULL || strlen(s) >= 32) {
+    printf("ERROR: illegal argument, e.g. string length >= 32\n");
+    return 1;
+  }
+
+  char t[32];
+  strncpy(t, s, 32);
+  int c = strclean(t);
+  
+  printf("input: \"%s\", result: \"%s\", removed: %d\n", s, t, c);
+
+  return 0;
+}