View Compilation Error

0_0_17101313_6794.cpp
0_0_17101313_6794.cpp(26) : error C3861: “sqrt”:  找不到标识符
0_0_17101313_6794.cpp(26) : error C3861: “pow”:  找不到标识符
0_0_17101313_6794.cpp(52) : error C3861: “fabs”:  找不到标识符
0_0_17101313_6794.cpp(55) : error C3861: “sort”:  找不到标识符
0_0_17101313_6794.cpp(59) : error C3861: “fabs”:  找不到标识符
0_0_17101313_6794.cpp(75) : error C2065: “cin”: 未声明的标识符
0_0_17101313_6794.cpp(75) : fatal error C1903: 无法从以前的错误中恢复；正在停止编译