Code:
#include stdio.h>
#include string.h>
#include ctype.h>
struct detail
{
char c;
int freq;
};
int main()
{
struct detail s[26];
char string[100], c;
int max[26] = {0}, min[26] = {0};
int i = 0, index, maxcount = 1, mincount = 1000, j;
for (i = 0; i < 26; i++)
{
s[i].c = i + 'a';
s[i].freq = 0;
}
printf("Enter string: ");
i = 0;
do
{
fflush(stdin);
c = getchar();
string[i++] = c;
if (c == '\n')
{
break;
}
else if (!isalpha(c))
{
continue;
}
c = tolower(c);
index = c - 'a';
s[index].freq++;
} while (1);
string[i - 1] = '\0';
printf("The string entered is: %s\n", string);
for (i = 0; i < 26; i++)
{
if (s[i].freq)
{
if (maxcount < s[i].freq)
{
for (j = 0; j < 26; j++)
{
max[j] = 0;
}
max[i] = 1;
maxcount = s[i].freq;
}
else if (maxcount == s[i].freq)
{
max[i] = 1;
}
if (mincount >= s[i].freq)
{
if (mincount == s[i].freq)
{
min[i] = 1;
}
else
{
for (j = 0; j < 26; j++)
{
min[j] = 0;
}
min[i] = 1;
mincount = s[i].freq;
}
}
}
}
printf("The most repeated characters are: ");
for (i = 0; i < 26; i++)
{
if (max[i])
{
printf("%c ", i + 'a');
}
}
printf("\nThe least repeated characters are: ");
for (i = 0; i < 26; i++)
{
if (min[i])
{
printf("%c ", i + 'a');
}
}
printf("\n");
return 0;
}
Output:
Enter string: I love C programming
The string entered is: I love C programming
The most repeated characters are: g i m o r
The least repeated characters are: a c e l n p v
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