头文件包含问题！头文件包含不进去啊！！！！急！！！！

[xinghun129]

头文件包含不进去啊！！！！
急！！！！
帮帮忙！

#ifndef EX1_H
#define EX1_H


class EX1 {

private:
   int N;
   vector <double> num;
   double mean,variance,stddeviation;
public:

    void shuru();
    void qmean();
    void qvariance();
    void qstddeviation();
    void show();
};

#endif//EX1_H///:~

#include<iostream>
#include<vector>
#include<cmath>
#include<ex1.h>


using namespace std;


void EX1::shuru()
{
	cout << "请输入您要输入数据的个数：" ;
	cin >> N;
	for(int i = 1;i <= N;i++){

		cout << "请输入第" << i << "个数" << endl;
		cin >> num.push_back([i-1]) >> endl;		
	}	
}

void EX1::qmean()
{

	for(int i = 0;i < N;i++){

		mean = mean + num[i]; 
	}
	mean = mean/N;	
}

void EX1::qvariance()
{

	float x = 0;
	for(int i = 0;i < N;i++){

		x = x + (num[i] - mean)*(num[i] - mean);	 
	}
	variance = x/(N - 1);	
}

void EX1::qstddeviation()
{

	stddeviation = (sqrt)variance;			
}

void EX1::show()
{

	cout << "平均值：" << mean << endl;
	cout << "方差：" << variance << endl;
	cout << "标准差："  << 	stddeviation << endl;		
}

错误信息：
C:\Users\xinghun\Desktop\作业\1>g++ -c ex1.cpp
ex.cpp:4:15: ex1.h: No such file or directory

[crst_zh]

#include“ex1.h”

[lingyin55]

#include "ex1.h"

[xinghun129]

刚才试了，还是不行啊。还是一样的错误

[lingyin55]

建议：
使用系统里提供的头文件时使用尖括号
使用自己编写的头文件时使用双引号

[xinghun129]

改成引号之后出现了以下错误：

C:\Users\xinghun\Desktop\11>g++ -c ex1.cpp
In file included from ex1.cpp:4:
ex1.h:9: error: ISO C++ forbids declaration of `vector' with no type
ex1.h:9: error: expected `;' before '<' token
ex1.cpp: In member function `void EX1::shuru()':
ex1.cpp:17: error: `num' was not declared in this scope
ex1.cpp:17: error: expected primary-expression before '[' token
ex1.cpp: In member function `void EX1::qmean()':
ex1.cpp:26: error: `num' was not declared in this scope
ex1.cpp: In member function `void EX1::qvariance()':
ex1.cpp:37: error: `num' was not declared in this scope
ex1.cpp: In member function `void EX1::qstddeviation()':
ex1.cpp:45: error: cannot resolve overloaded function `sqrt' based on conversion
to type `double'
ex1.cpp:45: error: expected `;' before "variance"

C:\Users\xinghun\Desktop\11>

[lingyin55]

#include<vector>
#include<cmath>

这两个写到头文件中去

[Quote=引用 5 楼 xinghun129 的回复:]
改成引号之后出现了以下错误：

C:\Users\xinghun\Desktop\11>g++ -c ex1.cpp
In file included from ex1.cpp:4:
ex1.h:9: error: ISO C++ forbids declaration of `vector' with no type
ex1.h:9: error: expected `;' before ' <' token
ex1.cpp: In member function `void EX1::shuru()':
ex1.cpp:17: error: `num' was not declared in this scope
ex1.cpp:17: error: expected primary-expression before '[…
[/Quote]

[xinghun129]

刚按照你说的做了，可是还是出现了同样的问题啊

[lingyin55]

不好意思，没注意，你可以在头文件的vector前加std::
或者把
#include<iostream>
#include<vector>
#include<cmath>
#include<ex1.h>


using namespace std;

这整段都加到头文件中

[Quote=引用 7 楼 xinghun129 的回复:]
刚按照你说的做了，可是还是出现了同样的问题啊
[/Quote]

[xinghun129]

可以了 谢谢

[amossavez]

楼主呀，除了要把<>改成""之外，你的代码里有好多错误呀，自己好好改改吧！！

#include<iostream>
#include<vector>
#include<cmath>
#include<ex1.h>


using namespace std;


void EX1::shuru()
{
    cout << "请输入您要输入数据的个数：" ;
    cin >> N;                   
    for(int i = 1;i <= N;i++){

        cout << "请输入第" << i << "个数" << endl;
        cin >> num.push_back([i-1]) >> endl;    //你的num是空的你怎么输出呀？？你[]什么意思？你先看看vector的用法吧，全错了！！！    
    }    
}

void EX1::qmean()
{

    for(int i = 0;i < N;i++){

        mean = mean + num[i]; 
    }
    mean = mean/N;    
}

void EX1::qvariance()
{

    float x = 0;
    for(int i = 0;i < N;i++){

        x = x + (num[i] - mean)*(num[i] - mean);     
    }
    variance = x/(N - 1);    
}

void EX1::qstddeviation()
{

    stddeviation = (sqrt)variance;    //这个地方也有错！！        
}

void EX1::show()
{

    cout << "平均值：" << mean << endl;
    cout << "方差：" << variance << endl;
    cout << "标准差："  <<     stddeviation << endl;        
}