Main.cc: In function ‘int main()’:
Main.cc:6:14: error: ‘pow’ was not declared in this scope
int ab=sqrt(pow(x1-x2,2)+pow(y1-y2,2));
^~~
Main.cc:6:14: note: suggested alternative: ‘putw’
int ab=sqrt(pow(x1-x2,2)+pow(y1-y2,2));
^~~
putw
Main.cc:6:9: error: ‘sqrt’ was not declared in this scope
int ab=sqrt(pow(x1-x2,2)+pow(y1-y2,2));
^~~~
Main.cc:6:9: note: suggested alternative: ‘qsort’
int ab=sqrt(pow(x1-x2,2)+pow(y1-y2,2));
^~~~
qsort