int main() {

unsigned int a; // Change 'int' to 'unsigned int'

    printf("Enter your number: ");
    scanf("%x", &a); // Now 'a' matches '%x' expected type
    printf("a = %u\n", a); // Use '%u' to correctly print an unsigned int

    return 0;
}

c-basic/hex_read_scanf.c

@@ -1,12 +1,11 @@
 #include <stdio.h>
 
-int main()
-{
-  int a, b;
+int main() {
+    unsigned int a; // Change 'int' to 'unsigned int'
 
-  printf("Enter your number : ");
-  scanf("%x", &a);
-  printf("a = %d\n", a);
+    printf("Enter your number: ");
+    scanf("%x", &a); // Now 'a' matches '%x' expected type
+    printf("a = %u\n", a); // Use '%u' to correctly print an unsigned int
 
-  return 0;
+    return 0;
 }