View Compilation Error

0_0_35900476_21053.cpp: In function 'int main()':
0_0_35900476_21053.cpp:6:8: error: conflicting declaration 'int a'
    int a,b,c,x,t,i=0;
        ^
0_0_35900476_21053.cpp:5:8: note: previous declaration as 'int a [3]'
    int a[3];
        ^
0_0_35900476_21053.cpp:7:34: error: lvalue required as left operand of assignment
    while(scanf("%d%d%d",&a,&b,&c)=!EOF)
                                  ^