linux c++ 第三章-优快云博客

本文通过实例讲解了C++中的整数类型（如int, short, long）及其最大值，展示了如何处理数据类型溢出和边界情况，并介绍了字符类型及其转义序列的使用。

1.整型：int,short,long,long long,char,unsigned int unsigned short....2

.最值：

#include<iostream>
#include<climits>

int main(void)
{
        using namespace std;

        int n{1};
        cout << "n = " << n << endl;
        int n_int = INT_MAX;
        short n_short = SHRT_MAX;
        cout << "int is " << sizeof n_int << " bytes." << endl;
        cout << "Maximum value: "
             <<"int: " <<  n_int << endl;
        cout << "short is " << sizeof(short) << endl;
        cout << "Maximum value: "
             << "short: " << n_short << endl;
        return 0;
}

3.越界：

#include<iostream>
#include<climits>
using namespace std;

int main(void)
{

        short sam = SHRT_MAX;
        unsigned sue = sam;
        cout << "sam has " << sam << " dollars and sue has "
             << sue << " dollars" << endl;

        sam =sam +1;
        sue =sue +1;
        cout << "sam has " << sam << " dollars and sue has "
             << sue << " dollars" << endl;

        return 0;
}

4.字符以及转义序列的应用：

#include<iostream>

using namespace std;

int main(void)
{
        char ch ='M';
        int i = ch;
        cout << "Char " << ch << " equals " << i << " in int." << endl; 
        cout << "Add one to " << ch  << endl;
        ch = ch + 1;
        i = ch;
        cout << "Char " << ch << " equals " << i << " in int." << endl;

        cout << "Display char ch: ";
        cout.put(ch);
        cout.put('!');

        cout << endl << "Done\n"; 
        return 0;
}