c++基础知识03

1.嵌套循环案例——九九乘法表

int main()
{
    //利用嵌套循环乘法口诀表
    for (int n = 1; n <= 9; n++)
    {
        for (int m = 1;  m <= n ; m++)
        {
 
            cout << m << "*" << n << "=" << m * n<<"  ";  //即使是单字符也要使用双引号切记！！
 
        }
        cout << endl;
 
    }
 
    system("pause");
 
    return 0;

2.跳转语句

1）总共有三类：break、continue和 goto。

2）其中break和continue的用法与其他编程语言相似。

3）goto语句需特别说明一下：代码运行时会强行跳转到标记处；

　　　　goto 标记名称（一般大写字母）；

　　　　标记名称：

3.一维数组

定义：1）数据类型 数组名[数组长度];

　　　2）数据类型 数组名[数组长度]={，，};

　　　3）数据类型 数组名[]={，，，};

数组名用途：

　　1）统计整个数组内存长度: sizeof(数组名)
 　　　单个数组元素内存长度：sizeof(数组名[0])
　　　 数组长度：整个数组内存长度/单个数组元素内存长度：sizeof(arr)/sizeof(arr[0])
　　2）数组内存首地址： cout<<(int)arr<<endl;
　　3）数组中第2个元素地址：cout<<(int)&arr[1] << endl;

数组元素逆置

    int a[] = {1,4,5,3,6,7};
    int b = sizeof(a) / sizeof(a[0]);//数组长度
    cout << "数组逆置前：" << endl;
    for (int i = 0; i < b; i++)
    {
        cout << a[i] << endl;
    }
 
    int start = 0;//数组起始位置
    int end = b-1;//数组末尾位置
    for ( ; start < end;)
    {
        //元素互换
        int temp = a[start];
        a[start] = a[end];
        a[end] = temp;
 
        start++;
        end--;
    }
    cout << "数组逆置后：" << endl;
    for (int i = 0; i < b; i++)
    {
        cout << a[i] << endl;
    }

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English

Arabic	Hebrew	Polish
Bulgarian	Hindi	Portuguese
Catalan	Hmong Daw	Romanian
Chinese Simplified	Hungarian	Russian
Chinese Traditional	Indonesian	Slovak
Czech	Italian	Slovenian
Danish	Japanese	Spanish
Dutch	Klingon	Swedish
English	Korean	Thai
Estonian	Latvian	Turkish
Finnish	Lithuanian	Ukrainian
French	Malay	Urdu
German	Maltese	Vietnamese
Greek	Norwegian	Welsh
Haitian Creole	Persian

 

TRANSLATE with

COPY THE URL BELOW

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EMBED THE SNIPPET BELOW IN YOUR SITE

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