C++ txt文件中的数据赢得'；用户输入[C+；+；] 字符串行； 流媒体搜索； 短回路=0； 常数int SIZE=6； 线重[尺寸]； int索引[6]={1,2,3,4,5}； int i； 智力选择； 字符串权重变化； searc

txt文件中的数据赢得'；用户输入[C+；+；]

字符串行；
流媒体搜索；
短回路=0；
常数int SIZE=6；
线重[尺寸]；
int索引[6]={1,2,3,4,5}；
int i；
智力选择；
字符串权重变化；
search.open（“name.txt”）//打开存储用户详细信息的文本文件
if（search.is_open（））
{
也许我错了，但它不应该是
weight[1]=weightChange
，而不是相反吗？如果我理解正确，您正试图从用户处读取数据并写入文件，对吗？要做到这一点，您需要写入文件（运算符），可能您必须将>>运算符更改为weight[1]；）应该是（搜索提示：这不会写入文件。提示：创建一个函数加载文件并返回数据，另一个函数获取数据并重新写入文件。
string line;
fstream search;
short loop = 0;
const int SIZE = 6;
string weight[SIZE];
int index[6] = { 1, 2, 3, 4, 5 };
int i;
int choice;
string weightChange;

search.open("name.txt"); //Opens the text file in which the user details are stored
if (search.is_open())
{
    cout << endl;
    while (getline(search, line)) { //While the program searches for the lines in the text file
        if (line.find("Current Weight(KG): ") != string::npos) { //If the string "Name" isnt the last word on the line
            weight[loop] = line; //Assings the strings read from the text file to the array called weight
            cout << index[loop] << ". " << weight[loop] << endl; //Outputs the index array which loops through the numbers in the array and outputs the weight variable which loops through the strings in the array
            loop++; //Iterates the loop 
        }
    }
        cout << "Which index would you like to change?" << endl;
        cout << "1, 2, 3, 4 or 5" << endl;
        cin >> choice;
        cout << "Weight being changed is " << weight[choice - 1] << endl;

        switch (choice) //Uses switch to allow the user to enter a number from the menu and then performs that function based on the user's input
        {
        case 1: //If the user enters choice 1, then the first weight index will be changed
            cout << "What would you like to change the user's weight to?" << endl;
            cin >> weightChange;
            weightChange = weight[1];

            search >> weight[1];

            cout << endl;
            break;
        }
}