View Compilation Error

0_0_17159700_21945.c: In function 'main':
0_0_17159700_21945.c:8:2: error: expected ';' before 'getchar'
  getchar();
  ^
0_0_17159700_21945.c:12:3: error: expected ',' or ';' before 'while'
   while (scanf("%d%d",&n,&m)==2&&!(n==0&&m==0))
   ^
0_0_17159700_21945.c:20:1: error: expected ';' before '}' token
 }
 ^