View Compilation Error

0_0_8499835_13946.cpp: In function `int main()':
0_0_8499835_13946.cpp:43: error: `uf' undeclared (first use this function)
0_0_8499835_13946.cpp:43: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8499835_13946.cpp:43: error: expected `;' before "tu"