View Compilation Error

0_0_17206671_10585.cpp: In member function 'bool isBiGraph_Class::isBiGraph()':
0_0_17206671_10585.cpp:62:44: error: 'memset' was not declared in this scope
                    memset(col,0,sizeof(col));
                                            ^
0_0_17206671_10585.cpp: In function 'bool isLink()':
0_0_17206671_10585.cpp:99:34: error: 'memset' was not declared in this scope
          memset(vis,0,sizeof(vis));
                                  ^
0_0_17206671_10585.cpp: In function 'int main()':
0_0_17206671_10585.cpp:120:46: error: 'memset' was not declared in this scope
                    memset(node,0,sizeof(node));
                                              ^