View Compilation Error

0_0_19980529_25716.cpp: In function 'int main()':
0_0_19980529_25716.cpp:6:6: error: 'flaot' was not declared in this scope
      flaot x1,x2,y1,y2,,s;
      ^
0_0_19980529_25716.cpp:8:17: error: 'x1' was not declared in this scope
      while(cin>>x1&&x1!=EOF){
                 ^
0_0_19980529_25716.cpp:9:11: error: 'x2' was not declared in this scope
      cin>>x2>>y1>>y2;
           ^
0_0_19980529_25716.cpp:9:15: error: 'y1' was not declared in this scope
      cin>>x2>>y1>>y2;
               ^
0_0_19980529_25716.cpp:9:19: error: 'y2' was not declared in this scope
      cin>>x2>>y1>>y2;
                   ^
0_0_19980529_25716.cpp:10:6: error: 'a' was not declared in this scope
      a=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));}
      ^
0_0_19980529_25716.cpp:10:44: error: 'sqrt' was not declared in this scope
      a=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));}
                                            ^
0_0_19980529_25716.cpp:11:12: error: 'a' was not declared in this scope
      cout<<a<<setprecision(2);
            ^