View Compilation Error

0_0_16607258_4293.cpp: In function 'int dec(char*, char*)':
0_0_16607258_4293.cpp:8:23: error: 'strcmp' was not declared in this scope
     a1=strcmp(a,"rock");
                       ^
0_0_16607258_4293.cpp: In function 'int main()':
0_0_16607258_4293.cpp:71:27: error: 'memset' was not declared in this scope
   memset(win,0,sizeof(win));
                           ^