Compilare: user.cpp: In function ‘int main()’: user.cpp:68:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < pts.size() - 1; ++ i) { ^ user.cpp:81:36: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘bool*’ [-Wformat=] scanf("%d", &coef[i][m + 1]); ^ user.cpp:119:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < angle.size(); ++ i) { ^ user.cpp:53:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("laser.in", "r", stdin); ^ user.cpp:54:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("laser.out", "w", stdout); ^ user.cpp:57:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:81:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &coef[i][m + 1]); ^ user.cpp: In member function ‘void SEGMENT::read()’: user.cpp:14:80: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &end1.first, &end1.second, &end2.first, &end2.second); ^