Main.cc: In function ‘int main()’: Main.cc:46:18: error: narrowing conversion of ‘1.0e+9’ from ‘double’ to ‘int’ inside { } [-Wnarrowing] node P={1e9,1e9}; ^ Main.cc:46:18: error: narrowing conversion of ‘1.0e+9’ from ‘double’ to ‘int’ inside { } [-Wnarrowing]