C语言程序在线求助

发布网友发布时间：2022-05-27 13:22

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热心网友时间：2023-10-25 04:46

#include<stdio.h>

#include<ctype.h>

int main()

{char a[100],ch;

int i,count[26],flag;

while(1)

{

printf("请输入一个字符串(a--z):\n");

scanf("%s",a);

for(i=0;i<26;i++)

count[i]=0;

flag=0;

for(i=0;a[i]!='\0';i++)

if(a[i]>='a'&&a[i]<='z')

count[a[i]-95]++;

for(i=0;i<26;i++)

if(count[i]==1)

{

printf("%c\n",i+95);

flag=1;

}

if(flag==0)

printf("no\n");

printf("是否继续输入字符串判断Y／N\n");

getchar();

if(ch=toupper(getchar())=='N')

break;

}

return 0;

}

热心网友时间：2023-10-25 04:47

#include<stdio.h>

typedef struct CharCount
{
    int count;
    int first_position;
}CharCount;

void main()
{
    int N = 0;
    int i = 0;
    int index = 0;
    char buffer[1024];
    CharCount count_list[26];
    int first_occur_position = 0;
    char first_occur_char    = '\0';

    scanf("%d", &N);

    while (N--)
    {
        scanf("%s", buffer);

        for (i = 0; i < 26; i++)
        {
            count_list[i].count = 0;
            count_list[i].first_position = -1;
        }
        for (i = 0; '\0' != buffer[i]; i++)
        {
            index = buffer[i] - 'a';
            if (0 == count_list[index].count)
            {
                count_list[index].first_position = i;
            }
            count_list[index].count++;
        }

        first_occur_char = '\0';
        for (i = 0; i < 26; i++)
        {
            if (count_list[i].count != 1)
                continue;

            if ('\0' == first_occur_char)
            {
                first_occur_char = 'a' + i;
                first_occur_position = count_list[i].first_position;
                continue;
            }

            if (first_occur_position > count_list[i].first_position)
            {
                first_occur_char = 'a' + i;
                first_occur_position = count_list[i].first_position;
            }
        }

        if ('\0' == first_occur_char)
        {
            printf("no\n");
        }
        else
        {
            printf("%c\n", first_occur_char);
        }
    }
}

热心网友时间：2023-10-25 04:47

#include <stdio.h>
int sh[50][26];
int main()
{
char s[50][200],*t,n,i;
scanf("%d",&n);
for(i=0;i<n;i++)
{
scanf("%s",s[i]);
for(t=s[i];*t;t++)
sh[i][*t-'a']++;
}
putchar(10);
for(i=0;i<n;i++)
{
for(t=s[i];*t;t++)
if(sh[i][*t-'a']==1) break;
if(*t)putchar(*t);
else printf("no");
putchar(10);
}
return 0;
}