View Compilation Error

0_0_17447939_27625.cpp:2:1: error: 'usingnamespace' does not name a type
 usingnamespace std;
 ^
0_0_17447939_27625.cpp:4:10: error: 'floata' was not declared in this scope
 bool cmp(floata, floatb)
          ^
0_0_17447939_27625.cpp:4:18: error: 'floatb' was not declared in this scope
 bool cmp(floata, floatb)
                  ^
0_0_17447939_27625.cpp:4:24: error: expression list treated as compound expression in initializer [-fpermissive]
 bool cmp(floata, floatb)
                        ^
0_0_17447939_27625.cpp:5:1: error: expected ',' or ';' before '{' token
 {
 ^