View Compilation Error

258773_0_23199.c: In function `main':
258773_0_23199.c:4: error: `i' undeclared (first use in this function)
258773_0_23199.c:4: error: (Each undeclared identifier is reported only once
258773_0_23199.c:4: error: for each function it appears in.)
258773_0_23199.c:4: error: `j' undeclared (first use in this function)