View Compilation Error

0_0_1609891_6162.cpp: In function `double dis(node, node)':
0_0_1609891_6162.cpp:12: error: expected `)' before ';' token
0_0_1609891_6162.cpp: In function `int main()':
0_0_1609891_6162.cpp:28: error: `p' undeclared (first use this function)
0_0_1609891_6162.cpp:28: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1609891_6162.cpp:29: error: `q' undeclared (first use this function)
0_0_1609891_6162.cpp:43: error: `k' undeclared (first use this function)
0_0_1609891_6162.cpp:50: error: `t' undeclared (first use this function)
0_0_1609891_6162.cpp:54: error: `isok' undeclared (first use this function)
0_0_1609891_6162.cpp:56: error: `inc' undeclared (first use this function)
0_0_1609891_6162.cpp:56: error: `now' undeclared (first use this function)