View Compilation Error

0_0_15035735_10140.cpp: In function 'int main()':
0_0_15035735_10140.cpp:5:31: error: 'While' was not declared in this scope
 While(scanf("%d%d",&a,&b)!=EOF)
                               ^
0_0_15035735_10140.cpp:8:1: error: 'return0' was not declared in this scope
 return0;
 ^