#includevoid exchange( int n ){ if ( n != 0){ exchange ( n/10 );
printf("%d ", n%10 ); }} int main(){ int n; printf("please input a number\n"); scanf("%d",&n); exchange (n);system("pause");} 如果一定要输出字符，需要进行整数到字符的转换：#include#includevoid exchange( int n )...
