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Thanks for your reply.Now i followed Kurt's opinions, all of errors have been eliminated except that the file can not be opened. So i don't know where is wrong about the code of opening the file....

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Yes, i added the brace, and run the code again, and the tips shown at the section of output become the following:
'my calculation.exe': Loaded 'C:\Users\liang\Documents\Visual Studio...

The update code is :#include<iostream>#include <math.h>
#include <stdio.h>
#include <stdlib.h>
using namespace std;
int main(void)

//define the constant
//double...

Hey Kurt, thanks for your reply. I tried, but some others errors still appear. Please see the following reply i made to salem. I guess the problem originates from the header file, but i have included...

:redface:

In the c++ code, how to write the code for integral of bessel function?
Can we just use the library function:such the first kind of bessel function,_j0(i),_j1(i)? No need to use the integral form of...

// WKB.cpp : Defines the entry point for the console application.

//the Unit of length is nm, and energy unit is eV, the rest physical quantities are charaterized by I.U.


#include<iostream>...