View Compilation Error

0_0_18331746_20383.cpp: In function 'int main()':
0_0_18331746_20383.cpp:9:1: error: 'bnint' was not declared in this scope
 bnint n;
 ^
0_0_18331746_20383.cpp:11:24: error: 'n' was not declared in this scope
 bnwhile(1==scanf("%d",&n))
                        ^
0_0_18331746_20383.cpp:11:26: error: 'bnwhile' was not declared in this scope
 bnwhile(1==scanf("%d",&n))
                          ^
0_0_18331746_20383.cpp:33:1: error: 'bnreturn' was not declared in this scope
 bnreturn 0;
 ^