C++ functions and string class objects

Functions and string-like objects

foreword

Impetuous people tend to ask: what should I learn? Don't ask, just learn.

C-style strings and string objects have almost the same purpose, but compared with arrays, string objects can implement the functions of passing and copying.

1. A small example

#include<iostream>
#include<string>
using namespace std;
const int SIZE = 5;
void display(const string sa[], int n);
int main()
{
    
    
	string list[SIZE];
	cout << "Enter " << SIZE << " favorite food: " << endl;
	for (int i = 0; i < SIZE; i++)
	{
    
    
		cout << i + 1<<":";
		getline(cin, list[i]);//用getline函数可捕获空格
	}
	cout << "Your list:" << endl;
	display(list,SIZE);
	return 0;
}
void display(const string sa[], int n)//该函数用来显示列表内容
{
    
    
	int i;
	for (i = 0; i < n; i++)
	{
    
    
		cout << i + 1 << ":" << sa[i] << endl;
	}
}

Among them, each element in the array is a string object, the formal parameter sa is a pointer to the string object, and sa[i] is a string object.