CODEWITHSUNDEEP
c++
Andrea Leto
Andrea Leto

Reputation: 21

How to find a character in a string?

I have already checked topics similar to this one but no one has been able to solve this problem.

So, I have to look for a character inside a string but it doesn't seem to work.

if (tracciatonuovos.find('T'))
{
    nterminale++;
}

The counter does not increase. But if I try to find an empty space, it counts for me, and yet the string is full

see image of output

First value is string, second is length of string, and third is the value of counter "nterminale".

Upvotes: 0

Views: 122

Answers (1)

pcodex
pcodex

Reputation: 1950

use the find function from the std::string class

std::string mystr = "Some String with T";
size_t apos = mystr.find("T");

Read more about it here

If you want to find the first occurrence use :

find_first_of

And if you want to repeatedly find all occurrences of a specific character you will also need to specify a search start position and will need to write a loop say something like :

size_t pos = 0;
while((pos = mystr.find(whatever, pos)) != std::string::npos)
{
   pos +=1;   
  // and your other logic here
}

Upvotes: 1

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