View Compilation Error

0_0_23218249_10986.cpp: In function 'int main(int, char**)':
0_0_23218249_10986.cpp:22:31: error: 'malloc' was not declared in this scope
      buf = (char *)malloc(1024); 
                               ^
0_0_23218249_10986.cpp:42:15: error: 'free' was not declared in this scope
      free(buf2); 
               ^