Shift array values to one position left for continuous input averaging.

left shift arrays

#include <stdio.h>
int main()
{
     int marks[10]={0,1,2,3,4,5,6,7,8,9},i;
     for(i=0; i<11; ++i)
     {
          printf("%d ",marks[i]);
     }
     while(1)
     {
     marks[0]=marks[1];
     marks[1]=marks[2];
     marks[3]=marks[4];
     marks[4]=marks[5];
     marks[5]=marks[6];
     marks[7]=marks[8];
     marks[8]=marks[9];
     marks[9]=marks[10];
     scanf("%d", &marks[10]);
     for(i=0; i<11; ++i)
     {
          printf("%d ",marks[i]);
     }
     }

}