Decimel to Binary in C

1:  #include <stdio.h>  
2:    
3:  int main()  
4:  {  
5:      int i;  
6:      scanf("%d",&i);  
7:      while(i--)  
8:      {  
9:        
10:       int n, c, k;  
11:     
12:   printf("Enter an integer in decimal number system\n");  
13:   scanf("%d", &n);  
14:     
15:   printf("%d in binary number system is:\n", n);  
16:     
17:   for (c = 31; c >= 0; c--)  
18:   {  
19:    k = n >> c;  
20:     
21:    if (k & 1)  
22:     printf("1");  
23:    else  
24:     printf("0");  
25:   }  
26:     
27:   printf("\n");  
28:    
29:   }   
30:   return 0;  
31:  }