View Compilation Error

0_0_7279007_20376.c:8: error: syntax error before '&' token
0_0_7279007_20376.c: In function `a':
0_0_7279007_20376.c:10: error: `c' undeclared (first use in this function)
0_0_7279007_20376.c:10: error: (Each undeclared identifier is reported only once
0_0_7279007_20376.c:10: error: for each function it appears in.)