c++获取键盘输入cin、scanf使用详解

#include<cstdio>
#include<iostream>
#include<cstring>

using namespace std;

int main()
{
/*
strlen包含在string.h头文件里，加上
#include <string.h>
#include <cstring> // C语言头文件为 string.h 新c++编译器 ，前面加c ，后去掉 .h
输入char[]
*/
char s[100100];
cin>>s;
//strlen和sizeof的区别
int len = strlen(s);
int size = sizeof(s); //100100
cout<<s<<" "<<len<<" "<<size<<endl;

//连续输入多个变量
double z,g;
int h;
cin>>z>>g>>h;
cout<<z<<" "<<g<<" "<<h<<endl;

//输入string
string str;
cin>>str;
int len1 = str.length();
int size1 = str.size();
cout<<str<<" "<<len1<<" "<<size1<<endl;

/*
printf,scanf两个函数都包含在库文件<stdio.h>中。
连续输入多个变量
*/
double x,y;
int w;
scanf("%lf%lf%d",&x,&y,&w);
printf("%lf %lf %d",x,y,w);
return 0;
}

#include<cstdio>
#include<iostream>
#include<cstring>

using namespace std;

int main()
{
/*
strlen包含在string.h头文件里，加上
#include <string.h>
#include <cstring> // C语言头文件为 string.h 新c++编译器 ，前面加c ，后去掉 .h
输入char[]
*/
char s[100100];
cin>>s;
//strlen和sizeof的区别
int len = strlen(s);
int size = sizeof(s); //100100
cout<<s<<" "<<len<<" "<<size<<endl;

//连续输入多个变量
double z,g;
int h;
cin>>z>>g>>h;
cout<<z<<" "<<g<<" "<<h<<endl;

//输入string
string str;
cin>>str;
int len1 = str.length();
int size1 = str.size();
cout<<str<<" "<<len1<<" "<<size1<<endl;

/*
printf,scanf两个函数都包含在库文件<stdio.h>中。
连续输入多个变量
*/
double x,y;
int w;
scanf("%lf%lf%d",&x,&y,&w);
printf("%lf %lf %d",x,y,w);
return 0;
}