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  1. #include <stdio.h>
  2.  
  3. unsigned concatenate(unsigned x, unsigned y) {
  4.     unsigned pow = 10;
  5.     while (y >= pow) pow *= 10;
  6.     return x * pow + y;        
  7. }
  8.  
  9. void unconcatenate(unsigned *first, unsigned *second, unsigned concatenated, unsigned limit) {
  10.     unsigned pow = 10;
  11.     while (pow < limit) pow *= 10;
  12.     *first = concatenated / pow;
  13.     *second = concatenated % pow;
  14. }
  15.  
  16. int main(void) {
  17.     unsigned x, y, foo = concatenate(1234, 56);
  18.  
  19.     unconcatenate(&x, &y, foo, 100);
  20.     printf("%u unconcatenaded to %u and %u.\n", foo, x, y);
  21. 	return 0;
  22. }
  23.  
Success #stdin #stdout 0s 5436KB
comments (?)
stdin 
Standard input is empty
stdout 
123456 unconcatenaded to 1234 and 56.
https://ideone.com/bg7qMd
[un]concatenate
language:
C (gcc 8.3)
created:
2 years ago
visibility:
secret

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