View Compilation Error

0_0_31108565_28130.cpp:3:5: error: expected constructor, destructor, or type conversion before 'int'
     int i,n,sum;
     ^
0_0_31108565_28130.cpp:4:5: error: expected unqualified-id before 'while'
     while(~scanf("%d,%d",&i,&n));
     ^
0_0_31108565_28130.cpp:5:5: error: expected unqualified-id before '{' token
     {
     ^
0_0_31108565_28130.cpp:10:5: error: expected unqualified-id before 'return'
     return 0;
     ^
0_0_31108565_28130.cpp:11:5: error: expected declaration before '}' token
     }
     ^