C语言作业，急求
从键盘上输入5个字符串，对其进行升序排序并输出，不能使用strcmp函数，求大佬帮忙看看，这到底哪错了，排序结果就是不正确#include<stdio.h>
#include<string.h>
#define MAX_LINE 5
#define MAX_LINE_LEN 81
void sortP_Str(char *pstr[]);
int Find(char a[],char b[]);
int main(void)
{
int i;
char *pstr, str;
for (i=0; i<MAX_LINE; i++)
{
pstr = str;
}
printf("Input 5 strings:\n");
for (i=0; i<MAX_LINE; i++)
{
gets(pstr);
}
sortP_Str(pstr);
printf("---------------------------\n");
for (i=0; i<MAX_LINE; i++)
{
printf("%s\n", pstr);
}
return 0;
}
void sortP_Str(char *pstr[])
{
int i, j;
char *p;
for (i=0; i<3; i++)
{
for (j=i; j<=3; j++)
{
if (Find(pstr,pstr))
{
p = *(pstr+i);
*(pstr+i) = *(pstr+j);
*(pstr+j) = p;
}
}
}
}
int Find(char a[],char b[])
{
int i = 0, j = 0;
int ret = 0;
while ((i<strlen(a))||(j<strlen(b)))
{
if (a> b)
{
ret = a - b;
}
else if (a< b)
{
ret = a - b;
}
else;
i++, j++;
}
return ret;
}
示例是这样的：
Input 5 strings:
hello
My
Friend
are you ready?
help me!
---------------------------
Friend
My
are you ready?
hello
help me!
你把代码用论坛要求的格式再发一遍吧，斜着看很累的{:10_260:} int main(void)
{
int i;
char *pstr, str;
for (i=0; i<MAX_LINE; i++)
{
pstr = str;
}
printf("Input 5 strings:\n");
for (i=0; i<MAX_LINE; i++)
{
gets(pstr);
}
sortP_Str(pstr);
printf("---------------------------\n");
for (i=0; i<MAX_LINE; i++)
{
printf("%s\n", pstr);
}
return 0;
}
void sortP_Str(char *pstr[])
{
int i, j;
char *p;
for (i=0; i<3; i++)
{
for (j=i; j<=3; j++)
{
if (Find(pstr,pstr))
{
p = *(pstr+i);
*(pstr+i) = *(pstr+j);
*(pstr+j) = p;
}
}
}
}
int Find(char a[],char b[])
{
int i = 0, j = 0;
int ret = 0;
while ((i<strlen(a))||(j<strlen(b)))
{
if (a> b)
{
ret = a - b;
}
else if (a< b)
{
ret = a - b;
}
else;
i++, j++;
}
return ret;
} 你最后那个while里面a>b和a<b所执行的是同一个表达式{:10_260:}是不是这里出了问题 本帖最后由 jackz007 于 2020-3-14 16:41 编辑
#include<stdio.h>
#define MAX_LINE 5
#define MAX_LINE_LEN 81
compare(char * s1 , char * s2)
{
int k , r ;
for(k = 0 , r = s1 - s2 ; s1 && s2 && ! r ; k ++ , r = s1 - s2) ;
return r ;
}
void sortstr(char str[])
{
char s ;
int d , i , j , k ;
for(i = i ; i < MAX_LINE ; i ++) {
for(j = i ; j > 0 && compare(str , str) > 0 ; j --) {
for(d = 0 , s = str ; s ; d ++ , s = str) ;
for(d = 0 , str = str ; str ; d ++ , str = str) ;
for(d = 0 , str = s ; str ; d ++ , str = s) ;
}
}
}
main(void)
{
char c , s ;
int i , j , k ;
for(i = 0 ; i < MAX_LINE ; i ++) for(j = 0 ; (c = getchar()) != '\n' ; s = c , s = '\0') ;
sortstr(s) ;
printf("\n****************************************\n\n") ;
for(i = 0 ; i < MAX_LINE ; i ++) printf("%s\n" , s) ;
}
编译、运行实况：
C:\Bin>g++ -o ss ss.c
C:\Bin>ss
hello
My
Friend
are you ready?
help me!
****************************************
Friend
My
are you ready?
hello
help me!
C:\Bin>
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