View Compilation Error

0_0_5103089_1327.c:2: error: syntax error before '/' token
0_0_5103089_1327.c:2: error: syntax error at '#' token
0_0_5103089_1327.c: In function `build':
0_0_5103089_1327.c:8: error: `grade' undeclared (first use in this function)
0_0_5103089_1327.c:8: error: (Each undeclared identifier is reported only once
0_0_5103089_1327.c:8: error: for each function it appears in.)
0_0_5103089_1327.c: In function `query':
0_0_5103089_1327.c:22: error: `grade' undeclared (first use in this function)
0_0_5103089_1327.c:30: error: syntax error before '/' token
0_0_5103089_1327.c:38: error: syntax error before '/' token
0_0_5103089_1327.c: In function `updata':
0_0_5103089_1327.c:50: error: `grade' undeclared (first use in this function)
0_0_5103089_1327.c: In function `main':
0_0_5103089_1327.c:71: error: syntax error before '/' token
0_0_5103089_1327.c:75: error: syntax error before '/' token