View Compilation Error

0_0_35095524_16255.cpp
0_0_35095524_16255.cpp(68) : error C2065: “string”: 未声明的标识符
0_0_35095524_16255.cpp(68) : error C2146: 语法错误: 缺少“;”(在标识符“ch”的前面)
0_0_35095524_16255.cpp(68) : error C2065: “ch”: 未声明的标识符
0_0_35095524_16255.cpp(72) : error C2065: “ch”: 未声明的标识符
0_0_35095524_16255.cpp(73) : error C2065: “ch”: 未声明的标识符
0_0_35095524_16255.cpp(77) : error C2065: “ch”: 未声明的标识符