学生标记的结构

时间:2015-12-16 11:35:18

标签: c++ arrays function struct max

我已将strudent定义为:

struct student{
    char name[50];
    int roll;
    int marks;
};

我正在尝试打印student s marks字段中struct student s[5]; int i; cout << "Enter information of students : " << endl; for(i=0;i<3;++i) { cout <<"Enter roll no : "; cin>>s[i].roll; cout << "Enter name : "; cin >> s[i].name; cout << endl << "Enter marks : "; cin >> s[i].marks; cout << endl; } for(int j=0;j<3;j++) { if(s[j].marks>60) { cout<<s[j].roll<<" "<<s[j].name<<" = "<<s[j].marks<<" is Passed"<<endl; } else { cout<<s[j].roll<<" "<<s[j].name<<" = "<<s[j].marks<<" is Failed"<< endl; } } cout<<endl; cout<<endl; int max=s[0].marks; for(int k=0; k<3; k++) { if(s[k].marks>max) { max=s[k].marks; } cout<<s[k].roll<<" "<<s[k].name<<" "<<max<<" is top in the class:"<<endl; } 的{​​{1}}:

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现在我打印所有的学生!我只想要名字,并且在所有人中都有最高分的学生名单。我做错了什么?

1 个答案:

答案 0 :(得分:1)

你说你:想要在所有学生中名列前茅的学生的姓名和名单

为此,您需要找到具有最高分数的学生的索引。但在我给你一个如何做到这一点的例子之前,我需要初始化整个 var phantom = require('phantom'); // var page = new WebPage(); // var system = require('system'); // var sBlob = system.args[1]; var sUrl = 'file:///C:/Users/editor.html?Blob='+sBlob; phantom.create(function(ph) { ph.createPage(function(page) { page.open(sUrl, function(status) { console.log("opened diagram? ", status); page.evaluate(function() { return document.getElementById("GraphImage").src; }, function(result) { console.log(result) ph.exit(); }); }); }); }, { dnodeOpts : { weak : false } }); 数组。这意味着:

  • 您的初始化循环需要运行数组的大小(s
  • 或者您的数组大小需要与您的循环(for(i = 0; i < sizeof(s) / sizeof(s[0]); ++i)
  • 匹配

一旦完成,您就可以有效地使用max_element找到具有最高分的学生:

student s[3]

const auto it = max_element(cbegin(s), cend(s), [](const auto& lhs, const auto& rhs){ return lhs.marks < rhs.marks; }); 现在指向具有最高分的学生,您可以这样打印:

it

您可以在此处查看此实例:http://ideone.com/JcPQMI