View Compilation Error

0_0_19465781_21476.cpp
0_0_19465781_21476.cpp(6) : error C2065: “cin”: 未声明的标识符
0_0_19465781_21476.cpp(7) : error C2065: “cout”: 未声明的标识符
0_0_19465781_21476.cpp(8) : error C2065: “cout”: 未声明的标识符
0_0_19465781_21476.cpp(16) : error C2059: 语法错误:“/”
0_0_19465781_21476.cpp(19) : error C2143: 语法错误 : 缺少“;”(在“{”的前面)
0_0_19465781_21476.cpp(19) : error C2447: “{”: 缺少函数标题(是否是老式的形式表?)