CODEWITHSUNDEEP
c++stringpointerscharacter
tweld
tweld

Reputation: 1

how can i get character from string with pointers c++?

how to make a program to take 4 letters from the front where the word you input has 10 letters, with the words free with pointers?

#include <iostream>
using namespace std;

int main(){
    string phrase;
    cout << "Input : ";
    cin >> phrase;
    cout << "Output: " << phrase.substr(0, 4);
    // i dont know how to use pointers
    return 0;
}

I want to do like that to the output but use pointers, what can I do?

Upvotes: 0

Views: 43

Answers (1)

user12002570
user12002570

Reputation: 1

I want to do like that to the output but use pointers, what can I do?

Given that the input string at least 10 characters long, you can use std::string::c_str as shown below:

const char* bPtr = phrase.c_str();
const char* ePtr = phrase.c_str() + 4;
std::string result(bPtr, ePtr);
    
cout << "Output: " << result;

Or a one liner:

std::string result(phrase.c_str(), phrase.c_str() + 4);

Or

std::string result(phrase.c_str(), 4);

Note that you can also use iterators using std::string::begin instead of pointers.

std::string result(phrase.begin(), phrase.begin() + 4);

Upvotes: 2

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