Compilare: main.cpp: In function 'void addCell(Coord)': main.cpp:27:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | if( matSize.lin >= mat.size() ) | ~~~~~~~~~~~~^~~~~~~~~~~~~ main.cpp:29:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | if( matSize.col >= mat[x.lin].size() ) | ~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void bfs(Coord, FILE*)': main.cpp:60:42: warning: array subscript has type 'char' [-Wchar-subscripts] 60 | to.c.lin = x.c.lin + dirs[dirChar[i]].lin; | ~~~~~~~~~^ main.cpp:61:42: warning: array subscript has type 'char' [-Wchar-subscripts] 61 | to.c.col = x.c.col + dirs[dirChar[i]].col; | ~~~~~~~~~^ main.cpp: In function 'int main()': main.cpp:96:31: warning: array subscript has type 'char' [-Wchar-subscripts] 96 | v[i] = {v[x].lin + dirs[dir].lin, v[x].col + dirs[dir].col}; | ^~~ main.cpp:96:57: warning: array subscript has type 'char' [-Wchar-subscripts] 96 | v[i] = {v[x].lin + dirs[dir].lin, v[x].col + dirs[dir].col}; | ^~~ main.cpp:111:25: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 111 | if( mat[i].size() < matSize.col ) | ~~~~~~~~~~~~~~^~~~~~~~~~~~~ main.cpp:114:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 114 | for( j = 0; j < mat[i].size(); j++ ) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'char opposite(char)': main.cpp:42:1: warning: control reaches end of non-void function [-Wreturn-type] 42 | } | ^