View Compilation Error

0_0_33801296_4461.cpp: In function 'bool searchpath()':
0_0_33801296_4461.cpp:18:28: error: 'memset' was not declared in this scope
     memset(dx,-1,sizeof(dx));
                            ^
0_0_33801296_4461.cpp: In function 'int match()':
0_0_33801296_4461.cpp:58:28: error: 'memset' was not declared in this scope
     memset(cx,-1,sizeof(cx));
                            ^