Compilare: user.cpp: In function ‘int main()’: user.cpp:105:18: warning: unused variable ‘x’ [-Wunused-variable] int n, m, i, x, y; ^ user.cpp:107:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d\n", &n, &m); ^ user.cpp:112:58: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d\n", &(pct.x), &(pct.y), &y); ^ user.cpp:129:64: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d\n", &(pct.x), &(pct.y), &(pct.r)); ^