c++ primer plus 第九章《编程题9.6.2》

最新推荐文章于 2020-02-09 17:22:06 发布

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本文介绍了一个简单的C++程序，该程序能够逐行读取用户输入的字符串，并统计每行及累计的字符数量。通过使用标准输入输出库和字符串处理功能，程序展示了基本的输入输出操作及字符串长度计算。

/*
 Enter a line:
 get out
 " get out " contains 7 characters
 7 characters total
 Enter next line (empty line to quit):
 leave me, please.
 " leave me, please. " contains 17 characters
 24 characters total
 */
#include <iostream>
#include <string>

void strcount(const std::string * str);

int main() {
    using namespace std;
    string input;

    cout << "Enter a line:\n";
    getline(cin, input);
    while (input != "") {
        strcount(&input);
        cout << "Enter next line (empty line to quit):\n";
        getline(cin, input);
    }
}

void strcount(const std::string * str) {
    using namespace std;
    static int total = 0;
    int count = 0;
    int i = 0;
    cout << "\" " << *str << " \" contains ";
    while ((*str)[i++])
         count++;
    total += count;
    cout << count << " characters\n";
    cout << total << " characters total\n";
}