View Compilation Error

0_0_9433569_14061.c: In function `main':
0_0_9433569_14061.c:6: error: `a' undeclared (first use in this function)
0_0_9433569_14061.c:6: error: (Each undeclared identifier is reported only once
0_0_9433569_14061.c:6: error: for each function it appears in.)
0_0_9433569_14061.c: In function `count':
0_0_9433569_14061.c:25: error: `a' undeclared (first use in this function)