View Compilation Error

0_0_37942482_27786.c: In function 'main':
0_0_37942482_27786.c:6:9: error: expected expression before '/' token
   sum=0;//
         ^
0_0_37942482_27786.c:6:9: error: expected declaration or statement at end of input
0_0_37942482_27786.c:6:9: error: expected declaration or statement at end of input