实验7

Posted 2020-11-19 jhufjih123

11-7
#include<iostream>
using namespace std;
int main(){
ios_base::fmtflags original_flags=cout.flags();
cout<<812<<‘|‘;
cout.setf(ios_base::left,ios_base::adjustfield);//使831左对齐，
cout.width(10);//输出长度10，补空
cout<<813<<815<<" ";
cout.unsetf(ios_base::adjustfield);
cout.precision(2);//控制输出精度
cout.setf(ios_base::uppercase|ios_base::scientific);//大写显示，控制精度
cout<<831.0;
cout.flags(original_flags);
return 0;
}
11-3
#include<fstream>
#include<string>
#include<iostream>
using namespace std;
int main(){
string m;
getline(cin,m,‘t‘);
ofstream out("text1.txt");
if(!out){
cout<<"wrong"<<endl;
return 1;
}
out<<m;
cout<<m;
out.close() ;

return 0;
}
11-4
#include<fstream>
#include<string>
#include<iostream>
using namespace std;
int main(){
string m;
ifstream in("text1.txt");
if(!in){
cout<<"wrong"<<endl;
return 1;
}
getline(in,m,‘t‘);
cout<<m;
in.close() ;

return 0;
}