Compilare: user.cpp: In function ‘char bridge(std::array<std::array<char, 100u>, 100u>&, int, int)’: user.cpp:51:9: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if ( i > 0 ) ^ user.cpp:56:9: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if ( j > 0 && ocean[ i ][ j - 1 ] == '0' ) ^ user.cpp:61:9: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if ( i < n - 1 && ocean[ i + 1 ][ j ] == '0' ) ^ user.cpp:66:9: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if ( j < m - 1 && ocean[ i ][ j + 1 ] == '0' ) ^