View Compilation Error

0_0_39678638_15292.cpp
0_0_39678638_15292.cpp(5) : error C2065: “MAXN”: 未声明的标识符
0_0_39678638_15292.cpp(5) : error C2133: “mystr”: 未知的大小
0_0_39678638_15292.cpp(7) : error C3861: “scanf”:  找不到标识符
0_0_39678638_15292.cpp(9) : error C3861: “getchar”:  找不到标识符
0_0_39678638_15292.cpp(19) : error C3861: “scanf”:  找不到标识符
0_0_39678638_15292.cpp(20) : error C3861: “scanf”:  找不到标识符
0_0_39678638_15292.cpp(21) : error C3861: “scanf”:  找不到标识符
0_0_39678638_15292.cpp(23) : error C3861: “dowork”:  找不到标识符
0_0_39678638_15292.cpp(25) : error C3861: “printf”:  找不到标识符
0_0_39678638_15292.cpp(27) : error C3861: “printf”:  找不到标识符