Compilare: user.cpp: In function ‘int main()’: user.cpp:78:7: warning: unused variable ‘line’ [-Wunused-variable] char line[1500]; ^ user.cpp:86:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int T; scanf("%d", &T); ^ user.cpp:90:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%s", &k, number); ^