c++笔记

 

Using namespace std;

 

 

1 cout << "enter two numbers:" << endl;
2     int v1 = 0, v2 = 0;
3     cin >> v1 >> v2;
4     cout << "the sum of " <<  v1  << " and " << v2 << " is " << v1 + v2 << endl;
#  the sum of 4 and 6 is 10
#输出变量v1，v2两边加空格，这样控制台输出结果才好看
#空格和回车 输入多个数

 1 while (cin>>value) 2 { 3 sum += value; 4 } 输入任意字母，退出循环，控制台得出结果

 

这里只统计最后连续输出的值    
心得：对于Cin输入流的用法不太熟悉

int  v = 0,a,cnt;
    while (cin>>a)
    {
        if (a == v)
        {
            ++cnt;
        }
        else
        {
            cnt = 1;
            v = a;
        }
    }
    cout << v << " 出现了 " << cnt << " 次 " << endl;

 

 1     int currVal = 0, newval = 0;
 2     if (cin>>currVal)
 3     {
 4         int cnt = 1;
 5         while (cin>>newval)
 6         {
 7             if (newval ==currVal)
 8             {
 9                 ++cnt;
10             }
11             else
12             {
13                 cout << currVal << " occurs " << cnt << " times " << endl;
14                 currVal = newval;
15                 cnt = 1;
16             }
17         }
18         cout << currVal << " occurs " << cnt << " times" << endl;
19     }
20     return 0;
正确统计输入中得每个值连续出现的次数

 

posted @ 2021-12-09 22:24  ethan178  Views(46)  Comments(0)  Edit  收藏  举报