Compilare: main.cpp:27:71: warning: multi-character character constant [-Wmultichar] if(v[i][j][k].dp==v[i-1][j-1][k-1].dp) v[i][j][k].dir='NV'; ^~~~ main.cpp:30:72: warning: multi-character character constant [-Wmultichar] else if(v[i][j][k].dp==v[i-1][j][k].dp) v[i][j][k].dir='SUS'; ^~~~~ main.cpp:45:30: warning: multi-character character constant [-Wmultichar] if(v[lat][x][y].dir=='NV') {x--;y--;} ^~~~ main.cpp: In function 'int main()': main.cpp:27:71: warning: overflow in implicit constant conversion [-Woverflow] if(v[i][j][k].dp==v[i-1][j-1][k-1].dp) v[i][j][k].dir='NV'; ^~~~ main.cpp:30:72: warning: overflow in implicit constant conversion [-Woverflow] else if(v[i][j][k].dp==v[i-1][j][k].dp) v[i][j][k].dir='SUS'; ^~~~~ main.cpp:46:43: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] else if(v[lat][x][y].dir=='V') y--; ^ main.cpp:46:30: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] else if(v[lat][x][y].dir=='V') y--; ~~~~~~~~~~~~~^~~