[C] scanf

void PosizionaNavi(){
   int Count = numeroNavi, nave = 1;
   char c_col = ' ';
   int raw = 0;

   printf("Insert coordinates for ship %i.\n",numeroNavi);
   while(Count>0){
        printf("Ship %u - Column: ",nave);
        scanf("%c",&c_col);
        printf("     raw: ");
        scanf("%d",&raw);
        printf("\n");
        while((c_col<'A'||c_col>'J')&&(raw<1||raw>10)){
             printf("Invalid input, reinsert coordinates.\n");
             printf("Ship %u - Column: ",nave);
             scanf("%c",&c_col);
             printf("     Raw: ");
             scanf("%d",&raw);
             printf("\n");
        }
        mArray[nave-1].colonna = c_col;
        mArray[nave-1].riga = raw;
        Count++;
        nave++;
    }
}

Code (markup):

If I run this code, for the first coordinates there's no problem, but when I should insert the second, I can't insert the column.
I know it's due to the enter key press when I insert the raw before, but I don't know how to corrct this problem.
Could you help me?