c++字符串题目

1.将阿拉伯数字转成中文数字，例如，输入字符串”我爱12你好34”，输出”我爱一二你好三四”(知识点：汉字及数字的替换)

#include <iostream>
#include <string>

using namespace std;

char* changeNumberToHanZi(string s,int length)
{
	int n = 0;
	for(int i = 0;i <= length;i++)
	{
		if(s[i] >= '0' && s[i] <= '9')
		{
			n++; 
		}
	}
	
	int b_length = length + n + 1;
	char* b = new char[b_length];
	b[b_length - 1] = '\0';
	char* chinese[] = {"零","一","二","三","四","五","六","七","八","九"}; 
	
	for(int i = length - 1,j = b_length - 2;i >= 0;i--,j--)
	{
		if(s[i] >= '0' && s[i] <= '9')
		{
			int t = s[i] - '0';
			char* hanzi = chinese[t];
			b[j] = hanzi[1];
			j--;
			b[j] = hanzi[0];
		}
		else
		{
			b[j] = s[i];
		}
	}
	
	return b;
} 

int main()
{
	string s = "我20你";
	int length = s.size(); 
	
	s = changeNumberToHanZi(s,length);
	cout<<s<<endl;
	
	return 0;
} 

2.字符串分解：一段文本以逗号分开，写一个函数将各段文本打印出来  

例如，

输入：hello, world , good, morning  
输出：

hello

world

good

morning

#include <iostream>

using namespace std;

int main()
{
	string s;
	cin>>s;
	
	int i = 0,j = 0;
	while(s[i] != '\0')
	{
		while(s[j] != ',' && s[j] != '\0')
		{
			j++;
		}
		for(int t = i;t < j;t++)
		{
			cout<<s[t];
		}
		cout<<endl;
		if(s[j] == ',')
		{
			j++;
			i = j;
		}
		if(s[j] == '\0')
		{
			break;
		}
	}
	
	return 0;
}