Compilare: user.cpp: In function ‘int Intersection(int, int)’: user.cpp:218:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘void Read()’: user.cpp:57:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d", &n, &m, &t); ^ user.cpp:61:80: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d %d", &startPs[i].y, &startPs[i].x, &startPs[i].type); ^ user.cpp: In function ‘int Surface(int)’: user.cpp:68:9: warning: ‘dy’ may be used uninitialized in this function [-Wmaybe-uninitialized] int dy; ^ user.cpp: In function ‘int Intersection(int, int)’: user.cpp:178:46: warning: ‘dy’ may be used uninitialized in this function [-Wmaybe-uninitialized] diff2 = (py - startPs[index1].y) * dy; ^