View Compilation Error

0_0_7855893_16934.c:3: error: syntax error before '/' token
0_0_7855893_16934.c:3: error: syntax error at '#' token
0_0_7855893_16934.c: In function `DFS':
0_0_7855893_16934.c:25: error: `tot' undeclared (first use in this function)
0_0_7855893_16934.c:25: error: (Each undeclared identifier is reported only once
0_0_7855893_16934.c:25: error: for each function it appears in.)
0_0_7855893_16934.c:29: error: `x' undeclared (first use in this function)
0_0_7855893_16934.c:29: error: `y' undeclared (first use in this function)
0_0_7855893_16934.c: In function `main':
0_0_7855893_16934.c:46: error: `tot' undeclared (first use in this function)
0_0_7855893_16934.c:55: error: `x' undeclared (first use in this function)
0_0_7855893_16934.c:56: error: `y' undeclared (first use in this function)