View Compilation Error

0_0_15871948_4092.cpp: In function 'int main()':
0_0_15871948_4092.cpp:6:32: error: 'malloc' was not declared in this scope
     a=(int *)malloc(sizeof(int));
                                ^
0_0_15871948_4092.cpp:19:11: error: 'free' was not declared in this scope
     free(a);
           ^