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  1. #include <stdio.h>
  2.  
  3. int xstrcmp(const char* s1, const char* s2)
  4. {
  5.     while(*s1 && (*s1==*s2))
  6.         s1++,s2++;
  7.     return *(const unsigned char*)s1-*(const unsigned char*)s2;
  8. }
  9.  
  10. int main(void) {
  11.         printf("%d\n", xstrcmp("a", "c"));
  12.         printf("%d\n", xstrcmp("c", "a"));
  13.         unsigned char a[] = {130, 0}, b[] = {135, 0};
  14.         printf("%d\n", xstrcmp((char *)a, (char *)b));
  15.         printf("%d\n", xstrcmp((char *)b, (char *)a));
  16.         return 0;
  17.  
  18. }
Success #stdin #stdout 0s 2248KB
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stdin
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Standard input is empty
stdout
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-2
2
-5
5
https://ideone.com/crYyX7
language:
C99 (gcc 8.3)
created:
12 years ago
visibility:
public

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