Add '!' to exit code printing message + formatting

vuln.c

@@ -275,6 +275,7 @@ uint8_t run_jit(Instruction *program, size_t len) {
 
 int main() {
     // TODO: signal handlers? SIGCHILD? seccomp?
+    // TODO: colors in message, just so that every is pissed :D
 
     setbuf(stdout, NULL);
     setbuf(stdin, NULL);
@@ -297,7 +298,7 @@ int main() {
 
         exit_code = run_jit(program, program_len);
 
-        printf("Your program exited with %d\n", exit_code);
+        printf("Your program exited with %d!\n", exit_code);
         free(program);
     }
 }