View Compilation Error

0_0_6558562_18096.cpp: In function `int query(int, int, int, int, int)':
0_0_6558562_18096.cpp:29: error: `qr' undeclared (first use this function)
0_0_6558562_18096.cpp:29: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6558562_18096.cpp:29: error: expected `)' at end of input
0_0_6558562_18096.cpp:29: error: expected primary-expression at end of input
0_0_6558562_18096.cpp:29: error: expected `;' at end of input
0_0_6558562_18096.cpp:29: error: expected `}' at end of input