View Compilation Error

0_0_16101239_2546.cpp:2:11: error: '::main' must return 'int'
 void main()
           ^
0_0_16101239_2546.cpp: In function 'int main()':
0_0_16101239_2546.cpp:5:11: error: expected '(' before 'scanf'
     while scanf("%d%d",&a,&b)!=EOF
           ^
0_0_16101239_2546.cpp:6:1: error: expected ')' before '}' token
 }
 ^
0_0_16101239_2546.cpp:6:1: error: expected primary-expression before '}' token