View Compilation Error

0_0_20010423_4279.cpp: In function 'int main()':
0_0_20010423_4279.cpp:5:6: error: expected '(' before '{' token
 while{scanf("%d%d",&a,&b)}
      ^
0_0_20010423_4279.cpp:5:6: error: expected primary-expression before '{' token
0_0_20010423_4279.cpp:5:6: error: expected ')' before '{' token
0_0_20010423_4279.cpp:5:26: error: expected ';' before '}' token
 while{scanf("%d%d",&a,&b)}
                          ^