View Compilation Error

0_0_6812527_21852.c: In function `search':
0_0_6812527_21852.c:25: error: `y2' undeclared (first use in this function)
0_0_6812527_21852.c:25: error: (Each undeclared identifier is reported only once
0_0_6812527_21852.c:25: error: for each function it appears in.)