extract char from string

Question

Having a string HelloHello how can I extract (i.e. omit) the first char, to have elloHello?

I've thought of .at() and string[n] but they return the value and don't delete it from the string

What type is your string? char* or std::string?

emsr
– emsr

2013-03-26 14:29:21 +00:00
Commented Mar 26, 2013 at 14:29 — emsr
– emsr, Commented Mar 26, 2013 at 14:29

Vaughn Cato · Accepted Answer · 2013-03-26 14:29:20Z

7

#include <iostream> #include <string> int main(int,char**) { std::string x = "HelloHello"; x.erase(x.begin()); std::cout << x << "\n"; return 0; }

prints

elloHello

answered Mar 26, 2013 at 14:29

Vaughn Cato

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2 Comments

Sara Kholusi Over a year ago

what is this operator called :: ?

Vaughn Cato Over a year ago

@SaraKholusi: That is the scope resolution operator.

masoud · Accepted Answer · 2013-03-26 14:29:49Z

Use erase

std::string str ("HelloHello"); str.erase (0,1); // Removes 1 characters starting at 0. // ... or str.erase(str.begin());

Memento Mori · Accepted Answer · 2013-03-26 14:30:00Z

You should use substring. The first parameter indicates the start position. The second parameter string::npos means you want the new string to contain all characters from the specified start position until the end of the string.

std::string shorterString = hellohello.substr(1, std::string::npos);

http://www.cplusplus.com/reference/string/string/substr/

Christopher J Smith · Accepted Answer · 2013-03-26 14:29:29Z

Try using substr()

Reference: http://www.cplusplus.com/reference/string/string/substr/

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