database.h #ifndefDATABASE#defineDATABASE#include<fstream>#include<iostream>usingnamespacestd;template<classT>classDatabase{public:Database();voidrun();private: fstream database;charfName[20];ostream&print(ostream&);voidadd(T&);boolfind(constT&);voidmodify(constT&);friendostream&operator<<(os...
#include <fstream.h> #include<stdlib.h> void main() { fstream f; f.open("my1.dat",ios::out|ios::in); if(!f) { cout<<"Can't open file!\n"; abort(); } char ch[]="abcdefg1234567.\n"; for(int i=0;i<sizeof(ch);i++) ...
#include<bits/stdc++.h> 这是一个万能头文件,相当于以下代码的总和 #include <iostream>#include <cstdio>#include <fstream>#include <algorithm>#include <cmath>#include <deque>#include <vector>#include <queue>#include <string>#include <cstring>#include #include <stack>#include <set>#include <c...
2、#include＜bits/stdc++.h＞这个头文件的含义 Plain Text 复制代码 9 1 #include<bits/stdc++.h> 这是一个 万能头文件 ，相当于以下代码的总和 Plain Text 复制代码 99 1 2 3 4 5 6 7 8 9 10 11 12 13 14 #include <iostream> #include <cstdio> #include <fstream> #include <...
Cheery_H Cheery_H06-092 #include<iostream>#include<cst #include<iostream> #include<cstring> #include<vector> #include<fstream> #include<locale> using namespace std; vector<string> s; int main(){ char ch; FILE *fp; if((fp=fopen("1.txt","r"))==NULL){ printf("打开文件失败\n")...
fstream f; reserv r; int flag=0,pnr; cout<<"\nPlease enter your PNR :"; cin>>pnr; f.open("reservations.dat",ios::in | ios::binary); while(f.read((char*)&r,sizeof(r))) { if(pnr==r.getpnr()) { cout<<"Your details are as follows :\n"; ...
【题目】ifstream的用法#includefstream.h#includeiostream.h //usingnamespacestd; staticcharch; main() { ifstreaminfile(filename,ios::in); if(!infile) { cout"openerror!"endl; exit(1); } infile.get(ch); cout.put(ch); coutendl;system("pause");}为何我这样写的时候程序说ifstream没有定义呢...
ifstream的用法#include<fstream.h> #include<iostream.h> //usingnamespacestd; staticcharch; main() { ifstreaminfile(filename,ios::in); if(!infile) { cout<<"openerror!"<<endl; exit(1); } infile.get(ch); cout.put(ch); cout<<endl; system("pause"); } 为何我这样写的时候程序说...
写出下列程序的运行结果【13】。 #include <iostream.h>. #include <fstream.h> #include <stdlib.h> void main()fstream outfile, infile; outfile.open("data.clat", ios:: out); if(!outfile)cout<<"Can’t open the file."<<end1; abort();outfile<<" 1234567890"<<end1; ...
include <float.h> //浮点数处理 include <fstream.h> //文件输入／输出 include <iomanip.h> //参数化输入／输出 include <iostream.h> //数据流输入／输出 include <limits.h> //定义各种数据类型最值常量 include <locale.h> //定义本地化函数 include <math.h> //...