View Compilation Error

0_0_33826545_16907.cpp:1:1: error: 'stream' does not name a type
 stream>
 ^
0_0_33826545_16907.cpp: In function 'void topoSort(int)':
0_0_33826545_16907.cpp:23:20: error: 'printf' was not declared in this scope
    printf("%d", top);
                    ^
0_0_33826545_16907.cpp:25:27: error: 'printf' was not declared in this scope
   } else printf(" %d", top);
                           ^
0_0_33826545_16907.cpp:39:9: error: 'puts' was not declared in this scope
  puts("");
         ^
0_0_33826545_16907.cpp: In function 'int main()':
0_0_33826545_16907.cpp:44:30: error: 'scanf' was not declared in this scope
  while (~scanf("%d%d", &n, &m)) {
                              ^