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  1. #include <cstring>
  2. #include <iostream>
  3.  
  4. using namespace std;
  5.  
  6. char *trimRight(char *s)
  7. {
  8.   char *spc=0, *p=s;
  9.  
  10.   while (*p)
  11.     if (*p == ' ')
  12.       for (spc=p; *++p==' '; );
  13.     else
  14.       ++p;
  15.  
  16.   if (spc && p!=s && p[-1]==' ') *spc = 0;
  17.  
  18.   return s;
  19. }
  20.  
  21. int main()
  22. {
  23.   char s[256];
  24.  
  25.   cout << '"' << trimRight(strcpy(s, ""))                  << '"' << endl;
  26.   cout << '"' << trimRight(strcpy(s, "abc qwe zzz   "))    << '"' << endl;
  27.   cout << '"' << trimRight(strcpy(s, "abc  qwe  zzz   "))  << '"' << endl;
  28.   cout << '"' << trimRight(strcpy(s, "abc  qwe  zzz   u")) << '"' << endl;
  29.  
  30.   return 0;
  31. }
Success #stdin #stdout 0s 4512KB
comments (?)
stdin
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Standard input is empty
stdout
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""
"abc qwe zzz"
"abc  qwe  zzz"
"abc  qwe  zzz   u"
https://ideone.com/EwHSCG
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
public

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