How to enter a string in c++

C Methods for inputting strings: 1) Direct input: cin >> str; 2) Specified size input: cin.get(str, size); 3) Whole line input: getline(cin, str).

How to enter a string in C

Directly enter

• cin >> str; Read a single word from standard input and store it in the variable str. Note that it stops reading when it encounters a space or newline character.
• cin.get(str, size); Read a string of the specified size (including the null character) from the standard input and store it in the array str.

getline

• getline(cin, str); Read the entire line from standard input, including spaces and newlines character, stored in the string str.

The following example demonstrates these methods:

int main() {
    string str1, str2;

    // 直接输入单词
    cout << "请输入一个单词：" << endl;
    cin >> str1;

    // 使用 getline 输入整行
    cout << "请输入一行文字：" << endl;
    getline(cin, str2);

    // 输出输入的字符串
    cout << "输入的单词：" << str1 << endl;
    cout << "输入的行：" << str2 << endl;

    return 0;
}

Notes:

• getline will not ignore the spaces at the end of the line, so you need to use the trim() method to remove excess spaces.
• getline(cin, str, '\n'); can be used to read the file content line by line.

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