foo.c: In function 'main':
foo.c:4:15: error: 'count' undeclared (first use in this function)
foo.c:4:15: note: each undeclared identifier is reported only once for each function it appears in
foo.c:4:23: error: 'h' undeclared (first use in this function)
foo.c:4:22: warning: left-hand operand of comma expression has no effect [-Wunused-value]
foo.c:4:25: error: 'i' undeclared (first use in this function)
foo.c:4:24: warning: left-hand operand of comma expression has no effect [-Wunused-value]
foo.c:4:9: warning: variable 'a' set but not used [-Wunused-but-set-variable]