« Strings in C++

Introduction to strings in C++

Copy
1#include <iostream>
2#include <iomanip>
3#include <algorithm>
4#include <string>
5#include <cstring>
6#include <vector>
7#include <cmath>
8#include <map>
9#include <climits>
10// climits for INT_MIN
11#include <unordered_map>
12using namespace std;
13int main()
14{
15    string *sp = new string;
16    // dynamic allocation of string
17
18    *sp = "India";
19    cout << "*sp: " << *sp << endl;
20    cout << "sp: " << sp << endl;
21
22    string s = "abc";
23    // static allocation of string
24
25    // cin >> s;
26    // I Love India will fail here as space is there. cin breaks around space
27
28    getline(cin, s);
29    cout << s << endl;
30
31    s = "Geek Convert";
32    cout << s << endl;
33    s[0] = 'r';
34    // strings can be treated as array. We can replace its char by char
35
36    cout << s << endl;
37
38    string s1 = "abc";
39    cout << s1 << endl;
40
41    string s2 = s + s1;
42    // we can concatenate strings
43
44    cout << s2 << endl;
45
46    cout << s2.size() << endl;
47    cout << s2.length() << endl;
48
49    cout << s2.substr(10) << endl;
50    // gets everything after 10
51
52    cout << s2.substr(10, 3) << endl;
53    // gets everything after 10 but only length 3
54
55    cout << s2.find("ek") << endl; // returns position for the first occurrence of an in the string s2
56
57    return 0;
58}