# include & ltstring.h & gt

# include & ltiostream.h & gt

void main()

{

int a，I，k，j = 0；

int b[20]；

Cout < < "Enter an integer:";

CIN & gt； & gta；

I = a； //backup a.

while(I & gt； 9)

{ k = I % 10； //The remainder is recorded in the array.

b[j]= k；

I = I/ 10； //I rounded the last bit of the record in the array.

j++；

} j-； //j is a little too much.

Cout & lt& lt me; //i is already less than 10, and the last number is i.

for(； j & gt=0; j -)

cout & lt& lt“，”& lt& ltb[j]；

cout & lt& ltendl

getchar()；

}

I've been making it up. It seems simple or mysterious! !