1. istringstream字符串流
#include <iostream>
#include <sstream>
#include <string>
using namespace std;
struct MyStruct
{
string str1, str2, str3;
double db;
int num;
char ch;
};
void main()
{
string mystring("china google microsoft 12.9 123 A");
MyStruct struct1;
istringstream input(mystring);//创建一个字符串扫描流
input >> struct1.str1 >> struct1.str2 >> struct1.str3 >> struct1.db >> struct1.num >> struct1.ch;
cout << struct1.str1 << endl;
cout << struct1.str2 << endl;
cout << struct1.str3 << endl;
cout << struct1.db << endl;
cout << struct1.num << endl;
cout << struct1.ch << endl;
cin.get();
}
2.实现类似字符串截取的功能
#include <iostream>
#include <sstream>
#include <string>
using namespace std;
//实现类似字符串截取的功能
void main()
{
char mystring[50] = "china#123#A";
for (char *p = mystring; *p != '\0'; p++)
{
if (*p == '#')
{
*p = ' ';
}
}
istringstream input(mystring);//创建一个字符串扫描流
string str;
int num;
char ch;
input >> str >> num >> ch;
cout << str << endl;
cout << num << endl;
cout << ch << endl;
cin.get();
}
运行结果：
3.实现类似字符串截取的功能
#include <iostream>
#include <sstream>
#include <string>
using namespace std;
//实现类似字符串截取的功能
void main()
{
ostringstream MYOUT;
char str[100] = { 0 };
//ostringstream MYOUT(str,sizeof(str));
char str1[50] = "a1234567b";
MYOUT << "a1234b" << " " << 123<< ""<< 234.89 << " " << 'h' << " " << str1 << endl;
cout << MYOUT.str();
//cout <<str;
cin.get();
}
运行结果如下：
4.字符串流中的put
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <sstream>
#include <string>
#include <stdlib.h>
using namespace std;
void main()
{
stringstream mystr;//字符串进行输入
mystr.put('X').put('Y');//连个字符输入
mystr << "ZXCV";//字符串输入
cout << mystr.str();
string str = mystr.str();//定义字符串接受值
char ch; //从字符串内部读取一个字符
mystr >> ch;
cout << "\n";
cout.put(ch);
cout << "\n";
cout << mystr.str();
std::cin.get();
system("pause");
}
运行结果
5.str()将流转换成为字符串string
#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <sstream>
#include <string>
#include <stdlib.h>
using namespace std;
void main()
{
stringstream mystr;//sprintf功能
char cmd1[30] = { 0 };
char cmd2[30] = { 0 };
cin.getline(cmd1, 30).getline(cmd2, 30);//输入两个字符串
mystr << cmd1 << "&" << cmd2;//字符打印
string str = mystr.str();//定义字符串接受值
system(str.c_str());
char cstr[50] = { 0 };//默认的字符串
strcpy(cstr, str.c_str());
cout << cstr << endl;
for (char *p = cstr; *p != '\0'; p++)
{
if (*p == '&')
{
*p = ' ';
}
}
char newcmd1[30] = { 0 };
char newcmd2[30] = { 0 };
stringstream newstr(cstr);//sscanf的功能
newstr >> newcmd1 >> newcmd2;
cout << newcmd1 << "\n" << newcmd2 << endl;
system("pause");
}
