我遇到了字符串方法的问题 [英] I'm having a problem with string methods

问题描述

我制作了这个代码，它应该接收一串Last，First MI，它应该在First MI Last中返回它。它应该通过引用调用来读取它并按值调用返回它。



它还应该分隔last，first和MI的值。并使用find（）取出逗号，然后将它们连接起来





这就是我所拥有但我得到的编译错误

I made this code that is supposed to receive a string of "Last, First MI" and it's supposed to return it in "First MI Last". It's supposed to read it using call by reference and return it on call by value.

It is also supposed to separate the values of last, first, and MI. and use find() to take out the commas and then concatenate them back up


This is what I have but I'm getting a compile error

#include <iostream>
#include <string>
#include <sstream>

using namespace std;

void inputData(string &); //Declare Call-by-reference function
void outputData(string); //Declare Call-by-value function

int main() {

	string myString;

	inputData(myString);
	outputData(myString);
}

void inputData(string &myString) {
    cout << "Last, First, MI : ";
    getline( cin, myString );
    istringstream parse( myString );
    string first, mi, last, fullname;
    int index;
    index = myString.find_last_of(' ');
    last = myString.substring(0, index);
    mi = myString.substring(index+1, index);
    first = myString.substring(index+1);
    fullname = first + mi + last;
    cout << fullname << " by reference " << endl; //Pass-by-reference*
}


void outputData(string myString) {
    cout << myString << " by value " << endl; //Pass-by-value
}

错误在

error is on

last = myString.substring(0, index);
mi = myString.substring(index+1, index);
first = myString.substring(index+1);

错误是

error is

In function 'void inputData(std::string&)':|
|25|error: 'struct std::basic_string<char, std::char_traits<char>, std::allocator<char> >' has no member named 'substring'|
|26|error: 'struct std::basic_string<char, std::char_traits<char>, std::allocator<char> >' has no member named 'substring'|
|27|error: 'struct std::basic_string<char, std::char_traits<char>, std::allocator<char> >' has no member named 'substring'|
||=== Build finished: 3 errors, 0 warnings ===|

提前谢谢，



对不起，



谢谢

Thanks in advance,

sorry,

Thanks

推荐答案

正如错误所说，std :: basic_string没有名为substring（）的成员函数，但它有一个名为substr（）。

As the error says, std::basic_string does not have a member function called substring(), it does however have one called substr().

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