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0_0_21731559_24033.cpp
0_0_21731559_24033.cpp(2) : error C2065: “N”: 未声明的标识符
0_0_21731559_24033.cpp(3) : error C2065: “N”: 未声明的标识符
0_0_21731559_24033.cpp(9) : error C3861: “memset”:  找不到标识符
0_0_21731559_24033.cpp(11) : error C2065: “EOF”: 未声明的标识符
0_0_21731559_24033.cpp(11) : error C3861: “scanf”:  找不到标识符
0_0_21731559_24033.cpp(11) : fatal error C1903: 无法从以前的错误中恢复；正在停止编译