src.cpp:8:11: error: 'nullptr' was not declared in this scope
int **c = nullptr; //二维数组，每个部件不同商家的价格
^
src.cpp:9:11: error: 'nullptr' was not declared in this scope
int **w = nullptr; //二维数组，每个部件不同商家的重量
^
src.cpp: In function 'void InPut()':
src.cpp:31:12: error: 'nullptr' was not declared in this scope
leaf = nullptr;
^
src.cpp: In function 'void MinWeightMachine()':
src.cpp:86:29: error: 'nullptr' was not declared in this scope
initial = createNode(0, nullptr, 0, 0, 0);
^