Remove last character from C string

Question

How can I remove last character from a C   string   I tried st   substr st length  -1   But it didn t work

User · Answer

buf erase buf size   - 1     This assumes you know that the string is not empty   If so  you ll get an out of range exception

User · Answer

Simple solution if you are using C  11  Probably O 1  time as well   st pop back

User · Answer

For a non-mutating version   st   myString substr 0  myString size  -1

User · Answer

str erase str begin     str size   - 1   str erase str rbegin    does not compile unfortunately  since reverse iterator cannot be converted to a normal iterator   C  11 is your friend in this case

User · Answer

int main         string str1  123     string str2   str1 substr  0 str1 length  -1      cout lt  lt str2     output  12    return 0

User · Answer

if  str size     gt  0   str resize  str size    - 1     An std  erase alternative is good  but I like the  - 1   whether based on a size or end-iterator  - to me  it helps expresses the intent   BTW - Is there really no std  string  pop back   - seems strange

User · Answer

That s all you need    include  lt string gt     string  pop back  amp  string  empty  if   st empty        st pop back

User · Answer

str erase  str end  -1    Reference  std  string  erase   prototype 2  no c  11 or c  0x needed

User · Answer

With C  11  you don t even need the length size  As long as the string is not empty  you can do the following   if   st empty      st erase std  prev st end         Erase element referred to by iterator one                                     before the end

User · Answer

If the length is non zero  you can also  str str length   - 1      0

[c++] Remove last character from C++ string

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