View Compilation Error

123416_0_6900.c: In function `main':
123416_0_6900.c:6: error: `w' undeclared (first use in this function)
123416_0_6900.c:6: error: (Each undeclared identifier is reported only once
123416_0_6900.c:6: error: for each function it appears in.)
123416_0_6900.c:6: error: `h' undeclared (first use in this function)
123416_0_6900.c:25: error: `i0' undeclared (first use in this function)
123416_0_6900.c:28: error: syntax error before "if"
123416_0_6900.c:47: error: syntax error before '}' token