View Compilation Error

0_0_3300103_31528.c: In function `cmp':
0_0_3300103_31528.c:12: error: `people' undeclared (first use in this function)
0_0_3300103_31528.c:12: error: (Each undeclared identifier is reported only once
0_0_3300103_31528.c:12: error: for each function it appears in.)
0_0_3300103_31528.c:12: error: syntax error before ')' token
0_0_3300103_31528.c:13: error: syntax error before ')' token