tolower

tolower function for C++ strings

由 妖精的绣舞 提交于 2019-12-30 16:49:09
问题 Is there an inbuilt function to convert C++ string from upper case letters to lowercase letters ? If not converting it to cstring and using tolower on each char is the only option ? Thank you very much in advance. 回答1: If boost is an option: #include <boost/algorithm/string.hpp> std::string str = "wHatEver"; boost::to_lower(str); Otherwise, you may use std::transform : std::string str = "wHatEver"; std::transform(str.begin(), str.end(), str.begin(), ::tolower); You can also use another

Why can't “transform(s.begin(),s.end(),s.begin(),tolower)” be complied successfully?

由 元气小坏坏 提交于 2019-12-27 20:10:36
问题 Given the code: #include <iostream> #include <cctype> #include <string> #include <algorithm> using namespace std; int main() { string s("ABCDEFGHIJKL"); transform(s.begin(),s.end(),s.begin(),tolower); cout<<s<<endl; } I get the error: No matching function for call to transform(__gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >,

Why can't “transform(s.begin(),s.end(),s.begin(),tolower)” be complied successfully?

由 浪子不回头ぞ 提交于 2019-12-27 20:10:05
问题 Given the code: #include <iostream> #include <cctype> #include <string> #include <algorithm> using namespace std; int main() { string s("ABCDEFGHIJKL"); transform(s.begin(),s.end(),s.begin(),tolower); cout<<s<<endl; } I get the error: No matching function for call to transform(__gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, __gnu_cxx::__normal_iterator<char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >,

How to convert String toUpper/toLower Case (Unicode is a MUST; Cyrillic, Greek, etc.)?

由 a 夏天 提交于 2019-12-23 05:18:29
问题 I'm searching a long time to find a method to convert a NON-LATIN String to upper and/or lowewr case. Cyrillic-, Greek- and co. Writing Systems. So in other words: Convert all characters that support upper/lower case to upper or lower. NOTE: QString from the Qt Framework supports this feature. But I'm searching for a non-Qt solution. I tried this piece of code, and it only supports Basic-Latin (a-z, A-Z) neither Á â ş Ş ȧ Ȧ etc. are supported. (???) Why so minimalistic? #include <iostream>

Convert char to lowercase in batch

由 ￡可爱￡侵袭症＋ 提交于 2019-12-23 01:37:26
问题 I am having trouble trying to convert a windows path into the cygwin-style linux like path. C:\path\to\file will be /cygdrive/c/path/to/file for instance. I have everything working except for converting the uppercase drive letter pulled out of the path to lowercase. The link everyone gives for these questions is: http://www.robvanderwoude.com/battech_convertcase.php and the for loop under "SET, Take Two" seemed the most appropriate. This is what I have so far: @ECHO OFF SETLOCAL

tolower function and merging two dataframes

由 落爺英雄遲暮 提交于 2019-12-11 14:47:41
问题 I have 3 dataframes called respectively: barometre2013, barometre2016, barometre2018. I've already merge barometre2018 and barometre2016 like this: baro1618 <- merge(barometre2016, barometre2018, all = TRUE) All was good, I have all rows of the two dataframes and the columns names that are the same are merged in one with all rows of the tow dataframes. Exactly what I wanted. The merged table looks like this: names(baro1618) [1] "q0qc" "regio" "sexe" "age" "langu" "q1a_1" "q1a_2" "q1a_3" "q1a

toupper tolower

由 纵饮孤独 提交于 2019-12-11 10:19:45
问题 How to use topper and tolower in the C language? I've tried to run the program that I've made, it runs properly the problem is since I should submit it to a website to check it whether it's right or wrong, every time I submit it, it says compile error. I made the code on macbook, using Xcode and it says on my toupper and tolower code -- implicit declaration of function 'toupper' is invalid in C99 #include <stdio.h> #include <string.h> int main() { int input; scanf("%d",&input); int jumlahkata

How to set a string to all lowercase [duplicate]

由 落花浮王杯 提交于 2019-12-07 05:19:23
问题 This question already has answers here : How do I lowercase a string in C? (5 answers) Closed 6 years ago . I have a char foo[SIZE]; //(string) and have inputed it correctly using %s (as in it printfs the correct input), but now want to set it to lowercase. So I tried using if (isupper(*foo)) *foo=tolower(*foo); ie when I do: printf("%s" foo); //I get the same text with upper case The text does not seem to change. Thank you. 回答1: foo isn't a pointer, so you don't want to use it as one. You

How to set a string to all lowercase [duplicate]

由 折月煮酒 提交于 2019-12-05 11:19:44
This question already has an answer here: How do I lowercase a string in C? 5 answers I have a char foo[SIZE]; //(string) and have inputed it correctly using %s (as in it printfs the correct input), but now want to set it to lowercase. So I tried using if (isupper(*foo)) *foo=tolower(*foo); ie when I do: printf("%s" foo); //I get the same text with upper case The text does not seem to change. Thank you. foo isn't a pointer, so you don't want to use it as one. You also don't have to check whether a character is an upper-case letter before using tolower -- it converts upper to lower case, and

Convert String To camelCase from TitleCase C#

由 爷，独闯天下 提交于 2019-12-04 14:59:54
问题 I have a string that I converted to a TextInfo.ToTitleCase and removed the underscores and joined the string together. Now I need to change the first and only the first character in the string to lower case and for some reason, I can not figure out how to accomplish it. Thanks in advance for the help. class Program { static void Main(string[] args) { string functionName = "zebulans_nightmare"; TextInfo txtInfo = new CultureInfo("en-us", false).TextInfo; functionName = txtInfo.ToTitleCase
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