View Compilation Error

213630_0_32209.c:8: error: syntax error before '&' token
213630_0_32209.c: In function `swap1':
213630_0_32209.c:11: error: `a' undeclared (first use in this function)
213630_0_32209.c:11: error: (Each undeclared identifier is reported only once
213630_0_32209.c:11: error: for each function it appears in.)
213630_0_32209.c:11: error: `b' undeclared (first use in this function)
213630_0_32209.c: At top level:
213630_0_32209.c:24: error: syntax error before '&' token
213630_0_32209.c: In function `swap2':
213630_0_32209.c:27: error: `a' undeclared (first use in this function)
213630_0_32209.c:27: error: `c' undeclared (first use in this function)
213630_0_32209.c:32: error: `b' undeclared (first use in this function)
213630_0_32209.c:33: error: `d' undeclared (first use in this function)