View Compilation Error

0_0_16674133_30217.c: In function 'main':
0_0_16674133_30217.c:6:11: error: expected identifier or '(' before ',' token
 int a,b,n,,m,i;
           ^
0_0_16674133_30217.c:9:1: error: missing terminating " character
 scanf("%d %d“，&a,&b);
 ^
0_0_16674133_30217.c:10:1: error: expected expression before 'if'
 if(a==0&&b==0) break;
 ^
0_0_16674133_30217.c:21:1: error: expected ';' before '}' token
 }
 ^
0_0_16674133_30217.c:32:1: error: expected declaration or statement at end of input
 }
 ^