Compilare: user.cpp: In function ‘int main()’: user.cpp:58:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<l1.size();i++) ^ user.cpp:62:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<l2.size();i++) ^ user.cpp:66:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<l3.size();i++) ^ user.cpp:16:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:25:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&miscari); ^ user.cpp:28:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&x1); ^ user.cpp:29:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&y1); ^ user.cpp:30:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&x2); ^ user.cpp:31:21: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&y2); ^