View Compilation Error

0_0_11493179_23212.cpp: In function `int main()':
0_0_11493179_23212.cpp:13: error: `t' undeclared (first use this function)
0_0_11493179_23212.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_11493179_23212.cpp:28: error: `j' undeclared (first use this function)
0_0_11493179_23212.cpp:29: error: `hash' undeclared (first use this function)