#包含?& ltstdio.h & gt
int?主()
{
int?天,x1,x2;
day = 5;
x2 = 1;
while(day & gt;0)
{ x 1 =(x2+2)* 2;
x2 = x 1;
日-;
}
printf("total=%d\n ",x 1);
回歸?0;
}按天數學計算,是156,沒錯。