Compilare: main.cpp: In function 'int main()': main.cpp:17:9: warning: this 'else' clause does not guard... [-Wmisleading-indentation] else ^~~~ main.cpp:30:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else' for(j=1;j<=m;j++)if(a[1][j]==2&&a[1][j-1]==-1&&a[1][j+1]==-1)g<<-1; ^~~