一行数逆序数

#include <stdio.h>
int main (  )
{
int n,a[1000],s,t,k,i=0,j;
scanf("%d",&n);
while(n>=10)
{
a[i++]=n%10;
n=n/10;
}
a[i]=n;
for(k=0;k<=i;k++)printf("%d ",a[k]);printf("
");
s=0 ;  t=0;j=0;
for(k=0;k<=i;k++)
{    j=i-k;  t=a[k];  
     while(j--)
 {
  t=t*10;
      }    
s=s+t;
}
printf("%d
",s);


return 0;
}

#include<iostream>
using namespace std;
int main()
{  
  int x,t,n,j,t1;
   while(cin>>x)
   {
        t=x;
        n=1;j=1;
        while(t=t/10)n++;//n是记录整数x的位数 
        for(int i=0;i<n;i++)
        {
             t1=x/j%10;//t1用来记录整数x的第i位数据 
 j=j*10;
            if(t==0&&t1==0)continue;//排除尾数的0 
            else {cout<<t1;t++;}
     }
         cout<<endl;
   }


return 0;
}

#include <stdio.h>
int main (  )
{
int n,a[1000],k,i=0;
scanf("%d",&n);
while(n>=10)
{
a[i++]=n%10;
n=n/10;
}
a[i]=n;
for(k=0;k<=i;k++)printf("%d",a[k]);
printf("
");

}