输入五个国家的名称并按字母顺序排列输出

[bwz290845851]

#include"stdio.h"
#include"string.h"
main()
{
char st[20],cs[5][20];
int i,j,p;
printf("input country'name:\n");
for(i=0;i<5;i++)
gets(cs[i]);
printf("\n");
for(i=0;i<5;i++)
puts(cs[i]);

for(i=0;i<5;i++)
{
p=i;strcpy(st,cs[i]);
for(j=j+1;j<5;j++)
if(strcmp(cs[j],st)<0)
{
p=j;strcpy(st,cs[j]);
}
if(p!=i)
{
strcpy(st,cs[i]);
strcpy(cs[i],cs[p]);
strcpy(cs[p],st);
}
puts(cs[i]);
}

printf("\n");

}
怎么排列不出来啊 我快疯了

[liao05050075]

#include"stdio.h" 
#include"string.h" 
main() 
{ 
	char st[20],cs[5][20]; 
	int i,j,p; 
	printf("input country'name:\n"); 
    for(i=0;i <5;i++) 
		gets(cs[i]); 
	printf("\n"); 
	for(i=0;i <5;i++) 
		puts(cs[i]); 
	
	for(i=0;i <5;i++) 
	{ 
		p=i;
		strcpy(st,cs[i]); 
		for(j=j+1;j <5;j++) //这一句改成j=i+1
			if(strcmp(cs[j],st) <0) 
			{ 
				p=j;strcpy(st,cs[j]); 
			} 
			if(p!=i) 
			{ 
				strcpy(st,cs[i]); 
				strcpy(cs[i],cs[p]); 
				strcpy(cs[p],st); 
			} 
			puts(cs[i]); 
	} 
	
	printf("\n"); 
	
} 

[nosxcy]

给你个示例做比较,交换指针来进行数组排序可能比你的方法要好些.

/* sort_str.c -- reads in strings and sorts them */

#include <stdio.h>

#include <string.h>

#define SIZE 81 /* string length limit, including \0 */

#define LIM 20 /* maximum number of lines to be read */

#define HALT "" /* null string to stop input */

void stsrt(char *strings[], int num);/* string-sort function */



int main(void)

{

char input[LIM][SIZE]; /* array to store input */

char *ptstr[LIM]; /* array of pointer variables */

int ct = 0; /* input count */

int k; /* output count */



printf("Input up to %d lines, and I will sort them.\n",LIM);

printf("To stop, press the Enter key at a line's start.\n");

while (ct < LIM && gets(input[ct]) != NULL

&& input[ct][0] != '\0')

{

ptstr[ct] = input[ct]; /* set ptrs to strings */

ct++;

}

stsrt(ptstr, ct); /* string sorter */

puts("\nHere's the sorted list:\n");

for (k = 0; k < ct; k++)

puts(ptstr[k]) ; /* sorted pointers */



return 0;

}



/* string-pointer-sorting function */

void stsrt(char *strings[], int num)

{

char *temp;

int top, seek;



for (top = 0; top < num-1; top++)

for (seek = top + 1; seek < num; seek++)

if (strcmp(strings[top],strings[seek]) > 0)

{

temp = strings[top];

strings[top] = strings[seek];

strings[seek] = temp;

}

}