C语言关于getchar()的小笔记

#include <windows.h>
#include <mmsystem.h>
#include <string.h>

void main()
{
    int a;
    char b;
    float c;
    printf("please input an integer:");
    scanf("%d", &a);
    printf("integer:%d\n", a);
    printf("please input an character:");
    getchar();/*将缓冲区的回车读走，如没有getchar(),scanf("%c",&b)会把回车读走，从而不能顺利输入字符型，scanf在读取字符型时需要区别对待，
因为它会读走回车，要加入getchar(),读取其他整型和float等类型时不用*/
    scanf("%c", &b);
    printf("character:%c\n", b);
    printf("please input a float number:");
    scanf("%f", &c);
    printf("float:%f\n", c);
}

/* Note:Your choice is C IDE */
#include "stdio.h"
void main()
{
  int a;
  char b;
  float c;
  printf("please input an integer:");
  scanf("%d",&a); 
  printf("integer:%d\n",a); 
  printf("please input an character:");
  scanf("%c",&b);
  printf("character:%c\n",b) ; 
  printf("please input a float number:");
  scanf("%f",&c);
  printf("float:%f\n",c) ; 
}

// Note:Your choice is C++ IDE
#include <iostream>
using namespace std;
int main()
{
  int a;
  char b;
  float c;
  cout<<"please input an integer:";
  cin>>a;
  cout<<"integer:"<<a<<endl; 
 cout<<"please input an character:";
 cin>>b;
 cout<<"character:"<<b<<endl ; 
  cout<<"please input a float number:";
  cin>>c;
cout<<"float:%f\n"<<c<<endl ; 
/*  return 0;*/
}