View Compilation Error

0_0_32862327_4635.cpp: In function 'int main()':
0_0_32862327_4635.cpp:39:29: error: 'memset' was not declared in this scope
   memset(mark,0,sizeof(mark));//初始化路标
                             ^
0_0_32862327_4635.cpp:40:18: error: 'strcmp' was not declared in this scope
   if(strcmp(e,"0")==0) break;//如果0结束
                  ^
0_0_32862327_4635.cpp:42:21: error: 'strcpy' was not declared in this scope
    strcpy(maz[c++],e);//否则记下
                     ^
0_0_32862327_4635.cpp:45:19: error: 'strcmp' was not declared in this scope
    if(strcmp(e,"0")==0)  break;
                   ^
0_0_32862327_4635.cpp:47:22: error: 'strcpy' was not declared in this scope
     strcpy(maz[c++],e);
                      ^
0_0_32862327_4635.cpp:51:25: error: 'strlen' was not declared in this scope
    int len=strlen(maz[i]);
                         ^
0_0_32862327_4635.cpp:62:7: error: 'i' was not declared in this scope
   for(i=0;i<c;i++)
       ^