View Compilation Error

0_0_26772169_2896.cpp: In function 'int main()':
0_0_26772169_2896.cpp:3:9: error: found ':' in nested-name-specifier, expected '::'
 {int a,b:
         ^
0_0_26772169_2896.cpp:3:8: error: 'b' has not been declared
 {int a,b:
        ^
0_0_26772169_2896.cpp:4:6: error: qualified-id in declaration before '(' token
 scanf("%d%d",&a,&b);
      ^
0_0_26772169_2896.cpp:5:15: error: 'b' was not declared in this scope
 while(!(a==0&&b==0))
               ^