C: input and output

/**
# encoding: utf-8
# 版权所有 2023 涂聚文有限公司
# 许可信息查看：
# 描述：输入输入出格式
# Author    : geovindu,Geovin Du 涂聚文.
# IDE       : CLion 2023.1.1 c17  windows 10
# Datetime  : 2023/11/12 6:43
# User      : geovindu
# Product   : CLion
# Project   : ctest
# File      : DuInput.c
# explain   : 学习
*/
//
// Created by geovindu on 2023/11/12.
//

#ifndef CTEST_DUINPUT_H
#define CTEST_DUINPUT_H


#include <stdio.h>
#include <ctype.h>
#include <stdbool.h>
#include <string.h>


/**
 * @brief Name buffer size
 */
#define LENGTH 50

/**
 * @brief Function prototypes
 */
void eatspaces(void);

/**
 * @brief
 * @param n
 * @return
 */
bool getinteger(int *n);

/**
 * @brief
 * @param name
 * @param length
 * @return
 */
char *getname(char *name, size_t length);

/**
 * @brief
 * @return
 */
bool isnewline(void);


/**
 * @brief 显示
 *
 *
 * */
void displayInput();


#endif //CTEST_DUINPUT_H

/**
# encoding: utf-8
# 版权所有 2023 涂聚文有限公司
# 许可信息查看：
# 描述： 输入输入出格式
# Author    : geovindu,Geovin Du 涂聚文.
# IDE       : CLion 2023.1.1 c17  windows 10
# Datetime  : 2023/11/12 6:43
# User      : geovindu
# Product   : CLion
# Project   : ctest
# File      : DuInput.c
# explain   : 学习
*/

//
// Created by geovindu on 2023/11/12.
//

#include "../includes/DuInput.h"


/**
 * @brief Function to ignore spaces from standard input 空格字符串
 *
 */
void eatspaces(void)
{
    char ch = 0;
    while(isspace(ch = (char)getchar()));
    ungetc(ch, stdin);
}

/**
 * @brief Function to read an integer from standard input
 * @param n
 * @return
 */
bool getinteger(int *n)
{
    eatspaces();
    int value = 0;
    int sign = 1;
    char ch = 0;

    // Check first character
    if((ch = (char)getchar()) == '-')            // should be minus
        sign = -1;
    else if(isdigit(ch))                 // ...or a digit
        value = ch - '0';
    else  if(ch != '+')                  // ...or plus
    {
        ungetc(ch, stdin);
        return false;                      // Not an integer
    }

    // Find more digits
    while(isdigit(ch = (char)getchar()))
        value = 10*value + (ch - '0');


    ungetc(ch,stdin);                    // Push back non-digit character
    *n = value*sign;                     // Set the sign
    return true;
}

/**
 * @brief Function to read an alphabetic name from input
 * @param name
 * @param length
 * @return
 */
char* getname(char *name, size_t length)
{

    eatspaces();                         // Remove leading spaces
    size_t count = 0;
    char ch = 0;
    while(isalpha(ch = (char)getchar()))       // As long as there are letters...
    {
        name[count++] = ch;                // ...store them in name.
        if(count == length - 1)            // Check for name full
            break;
    }

    name[count] = '\0';                  // Append string terminator
    if(count < length - 1)               // If we didn't end for name full...
        ungetc(ch, stdin);                 // ...return non-letter to stream
    return name;
}

/**
 * @brief Function to check for newline
 *
 *
 * */
bool isnewline(void)
{
    char ch = 0;
    if((ch = (char)getchar()) == '\n')
        return true;

    ungetc(ch, stdin);                   // Not newline so put it back
    return false;
}

/**
 * @brief
 *
 *
 * */
void displayInput()
{
    int number;
    char name[LENGTH] = {'\0'};
    printf("Enter a sequence of integers and alphabetic names in a single line:\n");
    while(!isnewline())
    {
        if(getinteger(&number))
            printf("Integer value:%8d\n", number);
        else if(strnlen_s(getname(name, LENGTH), LENGTH) > 0)
            printf("Name: %s\n", name);
        else
        {
            printf("Invalid input.\n");
            return 1;
        }
    }

}

 displayInput();