C++程序：vector对象相邻元素相加求和并输出，以及头尾元素相机求和输出

末蓝、 2022-12-02 00:52 90阅读 0赞

1、vector对象相邻元素相加求和并输出

#include<iostream>
    #include<string>
    #include<vector>
    #include<algorithm>
    #include<cmath>
    #include<string>
    #include<cctype>
    using namespace std;
    int main()
    {
    	vector<int> t;
    	for (vector<int>::size_type i = 0; i != 6; i++)
    	{
    		t.push_back(i);
    	}
    	if (t.size() % 2 == 0)
    	{
    		cout << "偶数个数" << endl;
    		for (vector<int>::size_type i = 0; i < t.size();)
    		{
    			cout << t[i] + t[i + 1] << "  ";
    			i += 2;
    		}
    	}
    	else
    	{
    		cout << "奇数个数" << endl;
    		for (vector<int>::size_type i = 0; i != t.size()-1; )
    		{
    			cout<< t[i] + t[i + 1] << "  ";
    			i += 2;
    		}
    		cout << t[t.size()-1] << endl;
    	}
    }

2、头尾元素相机求和输出

#include<iostream>
    #include<string>
    #include<vector>
    #include<algorithm>
    #include<cmath>
    #include<string>
    #include<cctype>
    using namespace std;
    int main()
    {
    	vector<int> t;
    	for (vector<int>::size_type i = 0; i != 5; i++)
    	{
    		t.push_back(i);
    	}
    	if (t.size() % 2 == 0)
    	{
    		cout << "偶数个数" << endl;
    		for (vector<int>::size_type i = 0; i !=t.size()/2;i++)
    		{
    			cout << t[i] + t[t.size() - 1-i] << "  ";
    			
    		}
    	}
    	else
    	{
    		cout << "奇数个数" << endl;
    		for (vector<int>::size_type i = 0; i != (t.size()-1)/2;i++ )
    		{
    			cout<< t[i] + t[t.size() - 1 - i] << "  ";
    		}
    		cout << t[(t.size() - 1) / 2] << endl;
    	}
    }

3、读取一段文本到vector中，将每个单词存储为一个元素，并将字母转化为大写，每8个元素输出一次

#include<iostream>
    #include<string>
    #include<vector>
    #include<algorithm>
    #include<cmath>
    #include<string>
    #include<cctype>
    using namespace std;
    int main()
    {
    	string text;
    	string temp;
    	vector<string> tt;
    	while (cin>>text)
    	{
    		if (text == "0")
    		{
    			break;
    		}
    		tt.push_back(text);
    	}
    	for (vector<string>::size_type i = 0; i != tt.size(); i++)
    	{
    		for (string::size_type j = 0; j !=tt[i].size(); j++)//tt[i].size()返回string::size_type类型
    		{
    			if (islower(tt[i][j]))
    			{
    				tt[i][j] = toupper(tt[i][j]);
    			}
    
    		}
    		cout << tt[i] << " ";
    		if ((i+1)%8==0)
    		{
    			cout << endl;
    		}
    		
    		
    	}
    
    }