View Compilation Error

0_0_9052851_3166.cpp: In function `int main()':
0_0_9052851_3166.cpp:10: error: `t' undeclared (first use this function)
0_0_9052851_3166.cpp:10: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9052851_3166.cpp:11: error: `h' undeclared (first use this function)
0_0_9052851_3166.cpp:17: error: `x' undeclared (first use this function)