View Compilation Error

769922_0_0_4691.c:12: error: syntax error before "a"
769922_0_0_4691.c: In function `cmp':
769922_0_0_4691.c:14: error: `a' undeclared (first use in this function)
769922_0_0_4691.c:14: error: (Each undeclared identifier is reported only once
769922_0_0_4691.c:14: error: for each function it appears in.)
769922_0_0_4691.c:14: error: `b' undeclared (first use in this function)
769922_0_0_4691.c: In function `bubble_sort':
769922_0_0_4691.c:26: error: `Player' undeclared (first use in this function)
769922_0_0_4691.c:26: error: syntax error before "tmp"
769922_0_0_4691.c:28: error: `tmp' undeclared (first use in this function)