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View Compilation Error

0_0_39705051_29353.cpp
0_0_39705051_29353.cpp(95) : error C2653: “chrono”: 不是类或命名空间名称
0_0_39705051_29353.cpp(95) : error C3861: “now”:  找不到标识符
0_0_39705051_29353.cpp(106) : error C2653: “chrono”: 不是类或命名空间名称
0_0_39705051_29353.cpp(106) : error C3861: “now”:  找不到标识符
0_0_39705051_29353.cpp(107) : error C2653: “chrono”: 不是类或命名空间名称
0_0_39705051_29353.cpp(107) : error C2065: “duration_cast”: 未声明的标识符
0_0_39705051_29353.cpp(107) : error C2065: “milliseconds”: 未声明的标识符
0_0_39705051_29353.cpp(107) : error C2228: “.count”的左边必须有类/结构/联合
0_0_39705051_29353.cpp(108) : error C3536: “duration”:  初始化之前无法使用


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