Compilare: user.cpp: In function ‘int main()’: user.cpp:56:12: warning: unused variable ‘x’ [-Wunused-variable] double x, y; ^ user.cpp:56:15: warning: unused variable ‘y’ [-Wunused-variable] double x, y; ^ user.cpp:63:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &t ); ^ user.cpp:71:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &n, &k ); ^ user.cpp:75:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &x, &y ); ^