View Compilation Error

0_0_15478919_31749.cpp:3:6: error: expected primary-expression before 'int'
 {    int n,m,j,i;
      ^
0_0_15478919_31749.cpp:3:6: error: expected '}' before 'int'
0_0_15478919_31749.cpp:3:6: error: expected ',' or ';' before 'int'
0_0_15478919_31749.cpp:4:6: error: expected unqualified-id before 'while'
      while(scanf("%d %d",&n,&m)!=EOF)
      ^