Compilare: user.cpp: In function ‘int main()’: user.cpp:18:9: warning: unused variable ‘numberOfPositionShow’ [-Wunused-variable] int numberOfPositionShow; ^~~~~~~~~~~~~~~~~~~~ user.cpp:29:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input, "%s", first); ^ user.cpp:30:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input, "%s", second); ^