学校acm比赛题

 1 #include<stdio.h>
 2 #include<string.h>
 3 #include<math.h>
 4 int main()
 5 {
 6     int  i, x, sum, sum1, n, sum2;
 7     int  z[100]={0};
 8     while( scanf( "%d" , &n ) != EOF )
 9     {   
10         sum = sum1 =sum2 = 0;
11         x = i = 0;
12         while( n )
13         {
14             z[x++] = n%2;
15             n = n / 2;
16         }
17         for( int j = x-1; j >= 0; j--)
18         {       
19             sum2=pow ( 2, i );
20             sum1+=pow( 2 , i )*z[j];
21             i++;
22         }         
23          printf( "%d\n" , sum1 );
24     }    
25     return 0;
26 }