int changdu(int a)//计算后一个整数的位数{
for(int i=0;a!=0;i++)
{
a=a/10;
}return i;}int pingjie(int a,int b)//将两个数拼接在一起{ int c; for(int i=0;i>a>>b;a=a*10+b;cout>a; cout#includemain(){
int a,b, n, temp;
a = 45;
b = 21;
// b >= 0
n = 0;
temp = b;
if (0 == temp)
{
...
