Trim Left char tchar[64]

[muroogan]

I read a text file into a char variable

char tchar[64];

I want to trim leading spaces (Left trim).How can I do that in C++.
Any input will be appreciated.

 

[wittempj]

You're probably better of using stl strings, and then you have to write
some code as in this link for example
http://www.experts-exchange.com/Programming/Programming_Languages/Cplusplus/Q_21282559.html

 

[Muruganandam]

hi,

Thanks for the response

Murugan

 

[Mike Wahler]

I read a text file into a char variable

char tchar[64];

I want to trim leading spaces (Left trim).How can I do that in C++.
Any input will be appreciated.

#include <algorithm>
#include <iostream>
#include <string>

void trimleft(char *arr)
{
std::string s(arr);
std::string::size_type pos(s.find_first_not_of(" "));

if(pos != std::string::npos)
{
s.erase(0, pos);
s += '\0';
std::copy(s.begin(), s.end(), arr);
}
else
*arr = 0;

}

void show(char *arr, const char *prefix = "")
{
std::cout << prefix << '[' << arr << ']' << '\n';
}

int main()
{
char tchar[64] = " Hello world ";

show(tchar, "Before:\n");
std::cout.put('\n');

trimleft(tchar);
show(tchar, "After:\n");
return 0;
}

-Mike

 

[Muruganandam]

Thanks Mike ,It worked like a charm