Compilare: user.cpp: In function ‘int main()’: user.cpp:20:12: warning: unused variable ‘x’ [-Wunused-variable] int n, x, y, cate=0, t; date aux, bux; ^ user.cpp:20:15: warning: unused variable ‘y’ [-Wunused-variable] int n, x, y, cate=0, t; date aux, bux; ^ user.cpp:21:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &t); ^ user.cpp:23:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &n); cate=0; ^ user.cpp:25:48: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &aux.st, &aux.dr); ^