C Program to Count All Occurrences of a Character in a String

C program to count all occurrences of a character in a string; Through this tutorial, we will learn how to count number of occurrences of a character in a string using for loop, while loop, recursion and functions in c programs.

Programs to Count All Occurrences of a Character in a String in C

• C Program to Count All Occurrences of a Character in a String using For Loop
• C Program to Count All Occurrences of a Character in a String using While Loop
• C Program to Count All Occurrences of a Character in a String Using Recursion
• C Program to Count All Occurrences of a Character in a String using Function

C Program to Count All Occurrences of a Character in a String using For Loop

#include <string.h>

int main()
{
    char s[1000],c;
    int i,count=0;

    printf("Enter  the string : ");
    gets(s);
    printf("Enter character to be searched: ");
    c=getchar();

    for(i=0;s[i];i++)
    {
    	if(s[i]==c)
    	{
          count++;
		}
 	}

	printf("character '%c' occurs %d times \n ",c,count);



    return 0;
}

The Output of the above c program; as follows:

Enter  the string : welcome to programmer world
Enter character to be searched: o
character 'o' occurs 4 times 

C Program to Count All Occurrences of a Character in a String using While Loop

/* C Program to Count All Occurrence of a Character in a String */

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

int main()
{
  	char str[100], ch;
  	int i, Count;
  	i = Count = 0;

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

  	printf("Enter character to be searched: ");

  	scanf("%c", &ch);

  	while(str[i] != '\0')
  	{
  		if(str[i] == ch)
		{
  			Count++;
 		}
 		i++;
	}
	printf("\n The Total Number of times '%c' has Occured = %d ", ch, Count);

  	return 0;
}

The Output of the above c program; as follows:

Please Enter any String :  welcome to c programming world
Enter character to be searched: c
The Total Number of times 'c' has Occured = 2 

C Program to Count All Occurrences of a Character in a String Using Recursion

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


int check(char *s,char c)
{
    static int i=0,count=0;
    if(!s[i])
    {
    	return count;
    }
    else
    {
        if(s[i]==c)
    	{
  			count++;
		}
		i++;
		check(s,c);
	}





}
int main()
{
    char s[1000],c;
	int count=0;

    printf("Enter  the string : ");
    gets(s);
    printf("Enter character to be searched: ");
    c=getchar();
    count=check(s,c);
    printf("character '%c' occurs %d times \n ",c,count);

	return 0;
 }

The Output of the above c program; as follows:

Enter  the string : hello test
Enter character to be searched: t
character 't' occurs 2 times
 

C Program to Count All Occurrences of a Character in a String using Function

/* C Program to Count All Occurrence of a Character in a String */

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

int Count_AllCharcater(char str[], char ch);

int main()
{
  	char str[100], ch;
  	int Count;
  	Count = 0;

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

    printf("Enter character to be searched: ");
  	scanf("%c", &ch);

  	Count = Count_AllCharcater(str, ch);

	printf("\n The Total Number of times '%c' has Occured = %d ", ch, Count);

  	return 0;
}

int Count_AllCharcater(char str[], char ch)
{
	int i, Count;
	Count = 0;

  	for(i = 0; i <= strlen(str); i++)
  	{
  		if(str[i] == ch)
		{
  			Count++;
 		}
	}
	return Count;
}

The Output of the above c program; as follows:

Please Enter any String :  test
Enter character to be searched: t
The Total Number of times 't' has Occured = 2 

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