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  1. #include <stdio.h>
  2.  
  3. int intDiv(int num, int den) {
  4.     int count = 0;
  5.     if (den <= 0)
  6.         return -1; /* Div not possible */
  7.     while (num >= den) {
  8.         num -= den;
  9.         count++;
  10.     }
  11.     return count;
  12. }
  13.  
  14. int divide(int n, int d) {
  15.     if(d <= 0)
  16.         return -1;
  17.     int k = d;
  18.     int i, c, index=1;
  19.     c = 0;
  20.     while(n > d){
  21.         d <<= 1;
  22.         index <<= 1;
  23.     }
  24.     while(1){
  25.         if(k > n)
  26.             return c;
  27.         if(n >= d){
  28.             c |= index;
  29.             n -= d;                
  30.         }
  31.         index >>= 1;
  32.         d >>= 1;
  33.     }
  34.     return c;
  35. }
  36.  
  37. int main()
  38. {
  39.     printf("%d %d %d %d\n", intDiv(4,5), intDiv(13,5), intDiv(20,4), intDiv(3,0));
  40.     printf("%d %d %d %d\n", divide(4,5), divide(13,5), divide(20,4), divide(3,0));
  41.  
  42.     return 0;
  43. }
Success #stdin #stdout 0s 2160KB
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stdin
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Standard input is empty
stdout
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0 2 5 -1
0 2 5 -1
https://ideone.com/BxRIEE
language:
C (gcc 8.3)
created:
9 years ago
visibility:
public

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