View Compilation Error

173969_0_28356.cpp
173969_0_28356.cpp(6) : error C2065: 'o' : undeclared identifier
173969_0_28356.cpp(6) : error C2001: newline in constant
173969_0_28356.cpp(7) : error C2143: syntax error : missing ')' before 'else'
173969_0_28356.cpp(8) : error C2143: syntax error : missing ';' before '{'