View Compilation Error

0_0_8253009_7131.c:22: error: syntax error before "x"
0_0_8253009_7131.c: In function `euler':
0_0_8253009_7131.c:25: error: `x' undeclared (first use in this function)
0_0_8253009_7131.c:25: error: (Each undeclared identifier is reported only once
0_0_8253009_7131.c:25: error: for each function it appears in.)