View Compilation Error

839059_0_0_6038.c: In function `main':
839059_0_0_6038.c:4: error: `dooble' undeclared (first use in this function)
839059_0_0_6038.c:4: error: (Each undeclared identifier is reported only once
839059_0_0_6038.c:4: error: for each function it appears in.)
839059_0_0_6038.c:4: error: syntax error before "a"
839059_0_0_6038.c:5: error: `a' undeclared (first use in this function)
839059_0_0_6038.c:5: error: `b' undeclared (first use in this function)
839059_0_0_6038.c:7: error: `c' undeclared (first use in this function)
839059_0_0_6038.c:9: error: `d' undeclared (first use in this function)