View Compilation Error

103022_0_491.c: In function `main':
103022_0_491.c:8: error: `prog' undeclared (first use in this function)
103022_0_491.c:8: error: (Each undeclared identifier is reported only once
103022_0_491.c:8: error: for each function it appears in.)
103022_0_491.c:8: error: syntax error before "t"
103022_0_491.c:11: error: `t' undeclared (first use in this function)