View Compilation Error

0_0_13746028_25214.cpp: In function 'int main()':
0_0_13746028_25214.cpp:4:6: error: expected '(' before '{' token
 while{scanf("%d %d",&a,&b)!=EOF)
      ^
0_0_13746028_25214.cpp:4:6: error: expected primary-expression before '{' token
0_0_13746028_25214.cpp:4:6: error: expected ')' before '{' token
0_0_13746028_25214.cpp:4:22: error: 'a' was not declared in this scope
 while{scanf("%d %d",&a,&b)!=EOF)
                      ^
0_0_13746028_25214.cpp:4:25: error: 'b' was not declared in this scope
 while{scanf("%d %d",&a,&b)!=EOF)
                         ^
0_0_13746028_25214.cpp:9:14: error: 'sum' was not declared in this scope
 }printf("%d",sum);
              ^
0_0_13746028_25214.cpp:11:1: error: expected '}' at end of input
 }
 ^