直接上程式碼：

#include <iostream> 
#include <string> 
#include <vector> 
#include <fstream> 
#include <string.h>
#include <dirent.h>
	
using namespace std;

//  Find all files  ext is  wav
void getFileNames(string path,vector<string>& filenames)
{
    DIR *pDir;
    struct dirent* ptr;
	
    if(!(pDir = opendir(path.c_str()))){
        cout<<"Folder doesn't Exist!"<<endl;
        return;
    }
    while((ptr = readdir(pDir))!=0) {
    	if(0 == strcmp(strchr(ptr->d_name, '.'), ".wav")){
    		 filenames.push_back(path + "/" + ptr->d_name);
    	}

    }
    closedir(pDir);
} 
void fileTest(){
	
	int i = 0;
	string path = "H:\\audio";

	vector<string> files;
	
	getFileNames(path, files);

	int file_numbers = files.size();


	for (i = 0; i < file_numbers; ++i) {
		char file_path[100];
		strcpy(file_path, files[i].c_str());
		
		//strcpy_s( file_path, files[i].c_str());
		
		printf("%-4d", i+1);
		cout<<"  "<< file_path <<endl;
	}
		
}

int main()
{	
	fileTest();	
}