首页 \ 问答 \ 如何一行一行或一整个文本文件读取？(How to read line by line or a whole text file at once?)

如何一行一行或一整个文本文件读取？(How to read line by line or a whole text file at once?)

 我在一个介绍文件的教程（如何从\到文件的读写） 
 

 首先，这不是一个功课，这只是我正在寻求的一般帮助。 
 

 我知道如何一次阅读一个字，但我不知道如何一次读一行或如何阅读整个文本文件。 
 

 如果我的文件包含1000个单词怎么办？ 阅读每个单词是不切实际的。 
 

 我的文本文件（Read）包含以下内容： 
 

 我喜欢玩游戏我喜欢阅读我有2本书 
 

 这是我迄今为止所完成的： 
 

#include <iostream>
#include <fstream>

using namespace std;
int main (){

  ifstream inFile;
  inFile.open("Read.txt");

  inFile >>

 

 是否有任何可能的方式一次阅读整个文件，而不是阅读每一行或每个单词分开？ 

I'm in a tutorial which introduces files (how to read and write from\to file)
 

First of all, this is not a homework, this is just general help I'm seeking.
 

I know how to read one word at a time, but I don't know how to read one line at a time or how to read the whole text file.
 

What if my file contains 1000 words? It is not practical to read each word.
 

My text file named (Read) contains the following:
 

I love to play games I love reading I have 2 books
 

This is what I have accomplished so far:
 

#include <iostream>
#include <fstream>

using namespace std;
int main (){

  ifstream inFile;
  inFile.open("Read.txt");

  inFile >>

 

Is there any possible way to read the whole file at once, instead of reading each line or each word separate?

原文：https://stackoverflow.com/questions/13035674
更新时间：2023-12-13 15:12

最满意答案

 这是实现这一目标的另一种方式，请检查是否符合您的要求 
 

 这是小提琴： http : //codepen.io/anon/pen/dOxyyd 
 

 

 
 
 
  
var parksListJSON = {
    "for": "abcde",
    "srn": "12345678",
    "cohort": "CS/IT/JH6",
    "modules": {
        "uh6com1051": {
            "name": "Scripting"
        },
        "uh6com1063": {
            "name": "UX"
        },
        "uh6com1099": {
            "name": "Project"
        }
    },
    "schedule": [{
        "module": "uh6com1051",
        "sessionType": "lab",
        "duration": 1,
        "allocatedTime": {
            "group": "A",
            "day": "mon",
            "location": "E406",
            "time": "11"
        },
        "alternativeTimes": [{
            "group": "B",
            "day": "tues",
            "location": "E150",
            "time": "11"
        }]
    }, {
        "module": "uh6com1051",
        "sessionType": "tutorial",
        "duration": 1,
        "allocatedTime": {
            "group": "A",
            "day": "weds",
            "location": "C402",
            "time": "9"
        },
        "alternativeTimes": [{
            "group": "B",
            "day": "thurs",
            "location": "C402",
            "time": "9"
        }]
    }, {
        "module": "uh6com1051",
        "sessionType": "lecture",
        "duration": 1,
        "day": "thurs",
        "location": "B400",
        "time": "15"
    }, {
        "module": "uh6com1063",
        "sessionType": "lab",
        "duration": 1,
        "allocatedTime": {
            "group": "A",
            "day": "tues",
            "location": "E407",
            "time": "11"
        },
        "alternativeTimes": [{
            "group": "B",
            "day": "weds",
            "location": "E150",
            "time": "9"
        }, {
            "group": "C",
            "day": "thurs",
            "location": "E150",
            "time": "11"
        }]
    }, {
        "module": "uh6com1063",
        "sessionType": "tutorial",
        "duration": 1,
        "allocatedTime": {
            "group": "A",
            "day": "mon",
            "location": "C402",
            "time": "13"
        },
        "alternativeTimes": [{
            "group": "B",
            "day": "thurs",
            "location": "C400",
            "time": "9"
        }, {
            "group": "C",
            "day": "fri",
            "location": "C400",
            "time": "9"
        }]
    }, {
        "module": "uh6com1063",
        "sessionType": "lecture",
        "duration": 1,
        "day": "tues",
        "location": "A166",
        "time": "12"
    }, {
        "module": "uh6com1099",
        "sessionType": "tutorial",
        "duration": 1,
        "allocatedTime": {
            "group": "D",
            "day": "weds",
            "location": "LB252",
            "time": "11"
        },
        "alternativeTimes": [{
            "group": "A",
            "day": "mon",
            "location": "LB252",
            "time": "13"
        }, {
            "group": "B",
            "day": "mon",
            "location": "LB252",
            "time": "16"
        }, {
            "group": "C",
            "day": "tues",
            "location": "LB252",
            "time": "11"
        }, {
            "group": "E",
            "day": "thurs",
            "location": "LB252",
            "time": "11"
        }]
    }, {
        "module": "uh6com1099",
        "sessionType": "lecture",
        "duration": 1,
        "day": "fri",
        "location": "A161",
        "time": "12"
    }]
}

function displaySchedule(schedule) {
    var scheduleElement = document.getElementsByClassName("schedule");
    for (var i = 0; i < schedule.length; ++i) {
        var cellElement;
        if (schedule[i].hasOwnProperty("allocatedTime")) {
            var allocatedTime = schedule[i].allocatedTime;
            cellElement = document.querySelector("." + allocatedTime.day + " .s" + allocatedTime.time);
            cellElement.innerHTML = getModuleText(schedule[i], allocatedTime);
        }
        if (schedule[i].hasOwnProperty("alternativeTimes")) {
            for (var j = 0; j < schedule[i].alternativeTimes.length; ++j) {
                var alternativeTime = schedule[i].alternativeTimes[j];
                cellElement = document.querySelector("." + alternativeTime.day + " .s" + alternativeTime.time);
                if (cellElement.innerHTML.length > 0) {
                    cellElement.innerHTML += "<br>";
                }
                cellElement.innerHTML += getModuleText(schedule[i], alternativeTime);
            }
        }
    }
}

// Helper function
function getModuleText(schedule, scheduleTime) {
    var text = "<div class='module'>" + 
        "<span class='title'>Mod: </span>" + schedule.module + "<br>" + 
        "<span class='title'>Type: </span>" + schedule.sessionType + "<br>" + 
        "<span class='title'>Loc: </span>" + scheduleTime.location + "<br>" + 
        "<span class='title'>Group: </span>" + scheduleTime.group + 
        "</div>";
    return text;
}

displaySchedule(parksListJSON.schedule);
 
  
/* Styles used from http://www.w3schools.com/css/css_table.asp . Check that link for info */

table.schedule {
    border-collapse: collapse;
    font-family: "Segoe UI", Arial, sans-serif;
}

.schedule th {
    background-color: #4CAF50;
    color: white;
}
.schedule th, .schedule td {
    padding: 25px;
    border-bottom: 1px solid #ddd;
}

.schedule tr:hover {
    background-color: #f5f5f5
}

.schedule tr:nth-child(even) {
    background-color: #f2f2f2
}

.schedule .dayRowHead, .schedule .title{
    font-weight: 500;
}

.schedule .module{
    border: 1px solid #ddd;
    padding: 10px;
}
 
  
<!-- Changed id to class -->

<table class='schedule'>
    <thead>
        <!-- Row 0-->
        <tr> 
            <th>Day</th>
            <th>09:00</th>
            <th>10:00</th>
            <th>11:00</th>
            <th>12:00</th>
            <th>13:00</th>
            <th>14:00</th>
            <th>15:00</th>
            <th>16:00</th>
            <th>17:00</th>
        </tr>
    </thead>
    <tbody>
        <!-- Row 1-->
        <tr class="mon">
            <td class="dayRowHead">Mon</td>
            <td class="s9"></td>
            <td class="s10"></td>
            <td class="s11"></td>
            <td class="s12"></td>
            <td class="s13"></td>
            <td class="s14"></td>
            <td class="s15"></td>
            <td class="s16"></td>
            <td class="s17"></td>
        </tr>
        <!-- Row 2-->
        <tr class="tues">
             <td class="dayRowHead">Tue</td>
             <td class="s9"></td>
            <td class="s10"></td>
            <td class="s11"></td>
            <td class="s12"></td>
            <td class="s13"></td>
            <td class="s14"></td>
            <td class="s15"></td>
            <td class="s16"></td>
            <td class="s17"></td>
        </tr>
        <!-- Row 3-->
        <tr class="weds">
            <td class="dayRowHead">Wed</td>
            <td class="s9"></td>
            <td class="s10"></td>
            <td class="s11"></td>
            <td class="s12"></td>
            <td class="s13"></td>
            <td class="s14"></td>
            <td class="s15"></td>
            <td class="s16"></td>
            <td class="s17"></td>
        </tr> 
        <!-- Row 3-->
        <tr class="thurs">
            <td class="dayRowHead">Thu</td> 
            <td class="s9"></td>
            <td class="s10"></td>
            <td class="s11"></td>
            <td class="s12"></td>
            <td class="s13"></td>
            <td class="s14"></td>
            <td class="s15"></td>
            <td class="s16"></td>
            <td class="s17"></td>
        </tr>
        <!-- Row 4-->
        <tr class="fri">
            <td class="dayRowHead">Fri</td>
            <td class="s9"></td>
            <td class="s10"></td>
            <td class="s11"></td>
            <td class="s12"></td>
            <td class="s13"></td>
            <td class="s14"></td>
            <td class="s15"></td>
            <td class="s16"></td>
            <td class="s17"></td>
        </tr>
    </tbody>
</table>
 
 
 

 


This is another way to achieve the same, check if suits your requirements
 

Here is the fiddle: http://codepen.io/anon/pen/dOxyyd
 

 

 
 
 
  
var parksListJSON = {
    "for": "abcde",
    "srn": "12345678",
    "cohort": "CS/IT/JH6",
    "modules": {
        "uh6com1051": {
            "name": "Scripting"
        },
        "uh6com1063": {
            "name": "UX"
        },
        "uh6com1099": {
            "name": "Project"
        }
    },
    "schedule": [{
        "module": "uh6com1051",
        "sessionType": "lab",
        "duration": 1,
        "allocatedTime": {
            "group": "A",
            "day": "mon",
            "location": "E406",
            "time": "11"
        },
        "alternativeTimes": [{
            "group": "B",
            "day": "tues",
            "location": "E150",
            "time": "11"
        }]
    }, {
        "module": "uh6com1051",
        "sessionType": "tutorial",
        "duration": 1,
        "allocatedTime": {
            "group": "A",
            "day": "weds",
            "location": "C402",
            "time": "9"
        },
        "alternativeTimes": [{
            "group": "B",
            "day": "thurs",
            "location": "C402",
            "time": "9"
        }]
    }, {
        "module": "uh6com1051",
        "sessionType": "lecture",
        "duration": 1,
        "day": "thurs",
        "location": "B400",
        "time": "15"
    }, {
        "module": "uh6com1063",
        "sessionType": "lab",
        "duration": 1,
        "allocatedTime": {
            "group": "A",
            "day": "tues",
            "location": "E407",
            "time": "11"
        },
        "alternativeTimes": [{
            "group": "B",
            "day": "weds",
            "location": "E150",
            "time": "9"
        }, {
            "group": "C",
            "day": "thurs",
            "location": "E150",
            "time": "11"
        }]
    }, {
        "module": "uh6com1063",
        "sessionType": "tutorial",
        "duration": 1,
        "allocatedTime": {
            "group": "A",
            "day": "mon",
            "location": "C402",
            "time": "13"
        },
        "alternativeTimes": [{
            "group": "B",
            "day": "thurs",
            "location": "C400",
            "time": "9"
        }, {
            "group": "C",
            "day": "fri",
            "location": "C400",
            "time": "9"
        }]
    }, {
        "module": "uh6com1063",
        "sessionType": "lecture",
        "duration": 1,
        "day": "tues",
        "location": "A166",
        "time": "12"
    }, {
        "module": "uh6com1099",
        "sessionType": "tutorial",
        "duration": 1,
        "allocatedTime": {
            "group": "D",
            "day": "weds",
            "location": "LB252",
            "time": "11"
        },
        "alternativeTimes": [{
            "group": "A",
            "day": "mon",
            "location": "LB252",
            "time": "13"
        }, {
            "group": "B",
            "day": "mon",
            "location": "LB252",
            "time": "16"
        }, {
            "group": "C",
            "day": "tues",
            "location": "LB252",
            "time": "11"
        }, {
            "group": "E",
            "day": "thurs",
            "location": "LB252",
            "time": "11"
        }]
    }, {
        "module": "uh6com1099",
        "sessionType": "lecture",
        "duration": 1,
        "day": "fri",
        "location": "A161",
        "time": "12"
    }]
}

function displaySchedule(schedule) {
    var scheduleElement = document.getElementsByClassName("schedule");
    for (var i = 0; i < schedule.length; ++i) {
        var cellElement;
        if (schedule[i].hasOwnProperty("allocatedTime")) {
            var allocatedTime = schedule[i].allocatedTime;
            cellElement = document.querySelector("." + allocatedTime.day + " .s" + allocatedTime.time);
            cellElement.innerHTML = getModuleText(schedule[i], allocatedTime);
        }
        if (schedule[i].hasOwnProperty("alternativeTimes")) {
            for (var j = 0; j < schedule[i].alternativeTimes.length; ++j) {
                var alternativeTime = schedule[i].alternativeTimes[j];
                cellElement = document.querySelector("." + alternativeTime.day + " .s" + alternativeTime.time);
                if (cellElement.innerHTML.length > 0) {
                    cellElement.innerHTML += "<br>";
                }
                cellElement.innerHTML += getModuleText(schedule[i], alternativeTime);
            }
        }
    }
}

// Helper function
function getModuleText(schedule, scheduleTime) {
    var text = "<div class='module'>" + 
        "<span class='title'>Mod: </span>" + schedule.module + "<br>" + 
        "<span class='title'>Type: </span>" + schedule.sessionType + "<br>" + 
        "<span class='title'>Loc: </span>" + scheduleTime.location + "<br>" + 
        "<span class='title'>Group: </span>" + scheduleTime.group + 
        "</div>";
    return text;
}

displaySchedule(parksListJSON.schedule);
 
  
/* Styles used from http://www.w3schools.com/css/css_table.asp . Check that link for info */

table.schedule {
    border-collapse: collapse;
    font-family: "Segoe UI", Arial, sans-serif;
}

.schedule th {
    background-color: #4CAF50;
    color: white;
}
.schedule th, .schedule td {
    padding: 25px;
    border-bottom: 1px solid #ddd;
}

.schedule tr:hover {
    background-color: #f5f5f5
}

.schedule tr:nth-child(even) {
    background-color: #f2f2f2
}

.schedule .dayRowHead, .schedule .title{
    font-weight: 500;
}

.schedule .module{
    border: 1px solid #ddd;
    padding: 10px;
}
 
  
<!-- Changed id to class -->

<table class='schedule'>
    <thead>
        <!-- Row 0-->
        <tr> 
            <th>Day</th>
            <th>09:00</th>
            <th>10:00</th>
            <th>11:00</th>
            <th>12:00</th>
            <th>13:00</th>
            <th>14:00</th>
            <th>15:00</th>
            <th>16:00</th>
            <th>17:00</th>
        </tr>
    </thead>
    <tbody>
        <!-- Row 1-->
        <tr class="mon">
            <td class="dayRowHead">Mon</td>
            <td class="s9"></td>
            <td class="s10"></td>
            <td class="s11"></td>
            <td class="s12"></td>
            <td class="s13"></td>
            <td class="s14"></td>
            <td class="s15"></td>
            <td class="s16"></td>
            <td class="s17"></td>
        </tr>
        <!-- Row 2-->
        <tr class="tues">
             <td class="dayRowHead">Tue</td>
             <td class="s9"></td>
            <td class="s10"></td>
            <td class="s11"></td>
            <td class="s12"></td>
            <td class="s13"></td>
            <td class="s14"></td>
            <td class="s15"></td>
            <td class="s16"></td>
            <td class="s17"></td>
        </tr>
        <!-- Row 3-->
        <tr class="weds">
            <td class="dayRowHead">Wed</td>
            <td class="s9"></td>
            <td class="s10"></td>
            <td class="s11"></td>
            <td class="s12"></td>
            <td class="s13"></td>
            <td class="s14"></td>
            <td class="s15"></td>
            <td class="s16"></td>
            <td class="s17"></td>
        </tr> 
        <!-- Row 3-->
        <tr class="thurs">
            <td class="dayRowHead">Thu</td> 
            <td class="s9"></td>
            <td class="s10"></td>
            <td class="s11"></td>
            <td class="s12"></td>
            <td class="s13"></td>
            <td class="s14"></td>
            <td class="s15"></td>
            <td class="s16"></td>
            <td class="s17"></td>
        </tr>
        <!-- Row 4-->
        <tr class="fri">
            <td class="dayRowHead">Fri</td>
            <td class="s9"></td>
            <td class="s10"></td>
            <td class="s11"></td>
            <td class="s12"></td>
            <td class="s13"></td>
            <td class="s14"></td>
            <td class="s15"></td>
            <td class="s16"></td>
            <td class="s17"></td>
        </tr>
    </tbody>
</table>

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