View Compilation Error

214996_0_29350.c:3: error: syntax error before '{' token
214996_0_29350.c:8: error: `y2' undeclared here (not in a function)
214996_0_29350.c:8: error: `y1' undeclared here (not in a function)
214996_0_29350.c:9: error: syntax error before "if"
214996_0_29350.c:12: error: `f1' undeclared here (not in a function)
214996_0_29350.c:12: error: initializer element is not constant
214996_0_29350.c:13: error: syntax error before string constant
214996_0_29350.c:13: error: conflicting types for 'printf'
214996_0_29350.c:13: note: a parameter list with an ellipsis can't match an empty parameter name list declaration
214996_0_29350.c:13: error: conflicting types for 'printf'
214996_0_29350.c:13: note: a parameter list with an ellipsis can't match an empty parameter name list declaration