View Compilation Error

0_0_3211461_17349.cpp: In function `int main()':
0_0_3211461_17349.cpp:10: error: `prinf' undeclared (first use this function)
0_0_3211461_17349.cpp:10: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3211461_17349.cpp:12: error: `n2' undeclared (first use this function)