View Compilation Error

0_0_27005954_11179.cpp: In function 'int main(int, const char**)':
0_0_27005954_11179.cpp:4:25: error: 'scanf' was not declared in this scope
     while(~scanf("%d",&n)){
                         ^
0_0_27005954_11179.cpp:14:41: error: 'printf' was not declared in this scope
                     printf("%d", a[i][j]);
                                         ^
0_0_27005954_11179.cpp:18:45: error: 'printf' was not declared in this scope
                         printf("%d", a[i][j]);
                                             ^
0_0_27005954_11179.cpp:21:31: error: 'printf' was not declared in this scope
                     printf(" ");
                               ^
0_0_27005954_11179.cpp:23:24: error: 'printf' was not declared in this scope
             printf("\n");
                        ^
0_0_27005954_11179.cpp:25:20: error: 'printf' was not declared in this scope
         printf("\n");
                    ^