gistfile1.c

/*
 * clang-exam1203.cpp
 */

#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <limits.h>

#pragma warning(disable : 4996)
#define BUF		256
#define MAX		21
#define LENGTH	5

/* Structure */
typedef struct {
	char b[MAX];
	int no;
} Student;

/* Function prototypes. */
int input(Student *);
void display(Student *, int);
int isNumber(char *);
int isName(char *);

int _tmain(int argc, _TCHAR* argv[])
{
	int i;
	Student student[LENGTH];

	for (i = 0; i < LENGTH; i++)
	{
		if (input(&student[i]))
		{
			break;
		}
	}

	display(student, i);

	return 0;
}

/* Data input function.
 * return 0 : success
 * return 1 : failed
 ******************************/
int input(Student *s)
{
	char buf[BUF];
	
	while (1)
	{
		printf("Input Numeric\t: ");
		gets(buf);

		/* Detect "END" or "end" string */
		if (!strcmp(buf, "END") || !strcmp(buf, "end"))
		{
			return 1;
		}

		if (isNumber(buf))
		{
			s->no = atoi(buf);
			break;
		}
	}

	while (1)
	{
		printf("Input Name\t: ");
		gets(buf);

		/* Detect "END" or "end" string */
		if (!strcmp(buf, "END") || !strcmp(buf, "end"))
		{
			return 1;
		}

		if (isName(buf))
		{
			strcpy(s->b, buf);
			break;
		}
	}

	return 0;
}

/* Data display function.
 ******************************/
void display(Student *s, int count)
{
	int i;

	for (i = 0; i < count; i++)
	{
		printf("No:%03d\tNAME:%s\n", (s+i)->no, (s+i)->b);
	}
}

/* Validate input number
 * return 1 : is number
 * return 0 : is NOT number
 ******************************/
int isNumber(char *buf)
{
	int i = 0, no;
	char tmp[MAX];

	if (!strcmp(buf, ""))
	{
		printf("ERROR INPUT NUMERIC!\n");
		return 0;
	}

	while (*(buf+i) != '\0')
	{
		if (!isdigit(*(buf+i)))
		{
			printf("ERROR INPUT NUMERIC!\n");
			return 0;
		}

		i++;
	}

	no = atoi(buf);
	itoa(no, tmp, 10);

	if (strcmp(buf, tmp) || no < INT_MIN || INT_MAX < no)
	{
		printf("ERROR LESS %d!\n", INT_MAX);
		return 0;
	}

	return 1;
}

/* Validate input name
 * return 1 : syntax OK
 * return 0 : syntax NG
 ******************************/
int isName(char *buf)
{
	int i = 0;
	char c;

	if (!strcmp(buf, ""))
	{
		printf("ERROR INPUT ALPHABET!\n");
		return 0;
	}

	if (strlen(buf) > 20)
	{
		printf("ERROR LESS %d!\n", MAX-1);
		return 0;
	}

	while (*(buf+i) != '\0')
	{
		c = *(buf+i);
		if (isalpha(c) == 0 && c != ' ')
		{
			printf("ERROR INPUT ALPHABET!\n");
			return 0;
		}

		i++;
	}

	return 1;
}