C Program to Find Minimum Occurring Character in a string

C program to find the minimum occurring characters in a string; Through this tutorial, we will learn how to find the minimum or lowest occurring characters in a string using the for loop and function in c programs.

Programs to Find Minimum Occurring Character in a string in C

To find the minimum or lowest occurring characters in a string using the for loop and function in c programs:

• C Program to Find Minimum Occurring Character in a string using For Loop
• C Program to Find Minimum Occurring Character in a string using Function

C Program to Find Minimum Occurring Character in a string using For Loop

#include <stdio.h>
#include <string.h>

int main()
{
  	char str[100], result;
  	int i, len;
  	int min = 0;

  	int freq[256] = {0};

  	printf("\n Please Enter any String :  ");
  	gets(str);

  	len = strlen(str);

  	for(i = 0; i < len; i++)
  	{
  		freq[str[i]]++;
	}

  	for(i = 0; i < 256; i++)
  	{
		if(freq[i] != 0)
		{
			if(freq[min] == 0 || freq[i] < freq[min])
			{
				min = i;
			}
		}
	}
	printf("\n Character '%c' appears Minimum of %d Times in a Given String :  %s ", min, freq[min], str);

  	return 0;
}

The Output of the above c program; as follows:

Please Enter any String :  hello c programmer
Character 'a' appears Minimum of 1 Times in a Given String :  hello c programmer 

C Program to Find Minimum Occurring Character in a string using Function

/* C Program to Find the Minimum Occurring Character in a String */

#include <stdio.h>
#include <string.h>

void Min_Occurring(char *str);

int main()
{
  	char str[100];

  	printf("\n Please Enter any String :  ");
  	gets(str);

  	Min_Occurring(str);

  	return 0;
}

void Min_Occurring(char *str)
{
	int i;
  	int min = 0;

  	int freq[256] = {0};

  	for(i = 0; str[i] != '\0'; i++)
  	{
  		freq[str[i]]++;
	}

  	for(i = 0; i < 256; i++)
  	{
		if(freq[i] != 0)
		{
			if(freq[min] == 0 || freq[i] < freq[min])
			{
				min = i;
			}
		}
	}
	printf("\n Character '%c' appears Minimum of %d Times in a Given String :  %s ", min, freq[min], str);
}

The Output of the above c program; as follows:

Please Enter any String :  welcome to c programming tutorials
Character 'n' appears Minimum of 1 Times in a Given String :  welcome to c programming tutorials 

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