c primer plus第十一章 第十一题
/* pe11.c -- manipulate the string list */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
// to make sure this program can run on both win and linux
#ifdef WIN32
#include <windows.h>
#elif linux
#include <unistd.h>
#endif
#define MAX_V 10
#define MAX_L 100
/* the gets function */
char * s_gets(char * st, int n);
/* used to get string list */
int get_list(char str_list[MAX_V][MAX_L]);
/* copy list */
void copy(char dest[MAX_V][MAX_L], char src[MAX_V][MAX_L], int num);
/* show loading animation */
void animation(void);
/* show the menu */
int menu(void);
/* print the original list */
void print_original_list(char str_list[MAX_V][MAX_L], int num);
/* print the strings in ASCII order */
void print_ascii_list(char str_list[MAX_V][MAX_L], int num);
/* print the strings in length order*/
void print_length_list(char str_list[MAX_V][MAX_L], int num);
/* print the strings in the first word length order */
void print_first_word_list(char str_list[MAX_V][MAX_L], int num);
/* the main function */
int main(void)
{
int opt, cnt;
char str[MAX_V][MAX_L], tmp[MAX_V][MAX_L];
cnt = get_list(str);
copy(tmp, str, cnt);
animation();
while (opt = menu())
{
switch (opt)
{
case 1:
print_original_list(str, cnt);
break;
case 2:
print_ascii_list(tmp, cnt);
break;
case 3:
print_length_list(tmp, cnt);
break;
case 4:
print_first_word_list(tmp, cnt);
break;
default:
printf("ERROR!!!");
}
printf("Press any key to continue.....");
getchar();
animation();
}
puts("The program is stoped.");
puts("Farewell!");
return 0;
}
/* the gets function */
char * s_gets(char * st, int n)
{
char * ret_val, tmp[n];
int i = 0;
ret_val = fgets(tmp, n, stdin);
// printf("%p\n", ret_val); // for test
if (ret_val)
{
strncpy(st, tmp, n);
while (st[i] != '\n' && st[i] != '\0')
i++;
if (st[i] == '\n')
st[i] = '\0';
else
while (getchar() != '\n')
continue;
}
return ret_val;
}
/* used to get string list */
int get_list(char str_list[MAX_V][MAX_L])
{
// to count to number of strings
int cnt = 0;
// to test if user input the EOF
char * test = "";
// prompt the user to input
printf("Please enter %d strings or use EOF to stop input:\n", MAX_V);
// get input
while (cnt < 10 && test != NULL)
{
test = s_gets(str_list[cnt], MAX_L - 1);
if (test != NULL)
cnt++;
}
// to clear the EOF from the stdin stream
clearerr(stdin); // include in the stdio.h
// return the number of strings
return cnt;
}
/* copy list */
void copy(char dest[MAX_V][MAX_L], char src[MAX_V][MAX_L], int num)
{
int i = 0;
for (i = 0; i < num; i++)
strncpy(dest[i], src[i], MAX_L);
}
/* show animation */
void animation(void)
{
int i = 0;
printf("Please wait 5s [ ]\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b");
for (i = 0; i < 5; i++)
{
#ifdef WIN32
Sleep(1000);
#elif linux
sleep(1);
#endif
printf("###");
fflush(stdout);
}
putchar('\n');
#ifdef WIN32
system("cls");
#elif linux
system("clear");
#endif
}
/* show the menu */
int menu(void)
{
int opt = -1;
puts("-----------------------------MENU--------------------------------");
puts("[1] print the original list");
puts("[2] print the list in the ASCII order");
puts("[3] print the list in the length order");
puts("[4] print the list in the first word length order");
puts("[0] quit\n\n");
printf("Please enter your choice: ");
scanf("%d", &opt);
if (0 > opt || opt > 4)
{
printf("Please enter the correct option number: ");
scanf("%d", &opt);
}
while (getchar() != '\n')
continue;
return opt;
}
/* print the original list */
void print_original_list(char str_list[MAX_V][MAX_L], int num)
{
int i = 0;
puts("\n-------------------------------------\n");
for (i = 0; i < num; i++)
puts(str_list[i]);
puts("\n-------------------------------------\n");
}
/* print the strings in ASCII order */
void print_ascii_list(char str_list[MAX_V][MAX_L], int num)
{
int i, j;
char tmp[MAX_L];
for (i = 0; i < num - 1; i++)
for (j = i + 1; j < num; j++)
if (strcmp(str_list[i], str_list[j]) > 0)
{
strcpy(tmp, str_list[i]);
strcpy(str_list[i], str_list[j]);
strcpy(str_list[j], tmp);
}
print_original_list(str_list, num);
}
/* print the strings in length order*/
void print_length_list(char str_list[MAX_V][MAX_L], int num)
{
int i, j;
char tmp[MAX_L];
for (i = 0; i < num - 1; i++)
for (j = i + 1; j < num; j++)
if (strlen(str_list[i]) > strlen(str_list[j]))
{
strcpy(tmp, str_list[i]);
strcpy(str_list[i], str_list[j]);
strcpy(str_list[j], tmp);
}
print_original_list(str_list, num);
}
/* print the strings in the first word length order */
void print_first_word_list(char str_list[MAX_V][MAX_L], int num)
{
int inword = 0, i, j, t, cnt[num];
for (i = 0; i < num; i++)
cnt[i] = 0;
char tmp[MAX_L];
// count
for (i = 0; i < num; i++)
for (j = 0; j < MAX_L; j++)
{
if (!inword && !(isspace(str_list[i][j]) || str_list[i][j] == '\0'))
{
inword = 1;
cnt[i]++;
}
else if (inword && !(isspace(str_list[i][j]) || str_list[i][j] == '\0'))
cnt[i]++;
else if (!inword && (isspace(str_list[i][j]) || str_list[i][j] == '\0'))
continue;
else
{
inword = 0;
break;
}
}
/*
for (i = 0; i < num; i++)
printf("%d\n", cnt[i]);
*/
// sort
for (i = 0; i < num - 1; i++)
for (j = i + 1; j < num; j++)
if (cnt[i] > cnt[j])
{
strcpy(tmp, str_list[i]);
t = cnt[i];
strcpy(str_list[i], str_list[j]);
cnt[i] = cnt[j];
strcpy(str_list[j], tmp);
cnt[j] = t;
}
print_original_list(str_list, num);
}
