Compilare: user.cpp: In function ‘int main()’: user.cpp:38:13: warning: unused variable ‘N’ [-Wunused-variable] int N = strlen(buf); ^ user.cpp:35:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ user.cpp:37:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s", buf); ^