C++ replace all occurances of character in string [duplicate]

Question

I have a program in C++ in which all the input into the program has underscores('_') instead of spaces. I'm trying to replace all the underscores which spaces(' '). I tried using std::replace but I keep getting errors, I'm not sure where I'm getting it wrong.

int main() { string j = "This_is_a_test"; j = std::replace( j.begin(), j.end(), '_', ' '); // I'm trying to get: This is a test from 'j', }

This is returning an error when I try compiling:

conversion from void' to non-scalar typestd::basic_string, std::allocator >' requested

Plus one: this is forgiveable if your normal language is Java. — Bathsheba
– Bathsheba, Commented Oct 20, 2015 at 11:43
@Bathsheba What? Java people don't know to look up documentation? Interesting... — juanchopanza
– juanchopanza, Commented Oct 20, 2015 at 11:44
@MelvinRufetu See the duplicate linked above. That has solutions to your problem. — juanchopanza
– juanchopanza, Commented Oct 20, 2015 at 11:47

cadaniluk · Accepted Answer · 2015-10-20 11:41:09Z

std::replace works on iterators, so it modifies the string directly, without a necessary return value. Use

std::replace(j.begin(), j.end(), '_', ' ');

instead.

flogram_dev · Accepted Answer · 2015-10-20 11:41:48Z

1

std::replace returns void.

You can't assign void to std::string.

answered Oct 20, 2015 at 11:41

flogram_dev

43k11 gold badges109 silver badges161 bronze badges

Comments

vishal · Accepted Answer · 2015-10-20 11:42:36Z

0

You just have to use :

 std::replace( j.begin(), j.end(), '_', ' '); cout<<j;

answered Oct 20, 2015 at 11:42

vishal

2,4011 gold badge20 silver badges28 bronze badges

Collectives™ on Stack Overflow

C++ replace all occurances of character in string [duplicate]

3 Answers 3

Comments

Comments

Comments

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Linked

Related