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C program to Delete first occurrence of character in a string

robaa
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2022-11-24
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Write a C program to Delete first occurrence of character in a string. Here’s simple C program to Delete first occurrence of character in a string in C Programming Language.

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robaa
2022-11-24
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C – Strings : 

Strings are actually one-dimensional array of characters terminated by a null character ‘\0’. Thus a null-terminated string contains the characters that comprise the string followed by a null.

 
 

String is a sequence of characters. char data type is used to represent one single character in C. So if you want to use a string in your program then you can use an array of characters.

The declaration and definition of the string using an array of chars is similar to declaration and definition of an array of any other data type.

Any string ends with a terminating null character ‘\0’. An array definition in such a way should include null character ‘\0’ as the last element.

 

Here is source code of the C program to Delete first occurrence of character in a string. The C program is successfully compiled and run(on Codeblocks) on a Windows system. The program output is also shown in below.

SOURCE CODE : :

/*  C program to Delete first occurrence of character in a string  */

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

#define MAX_SIZE 100 //Maximum size of the string



/** Function declaration */
void removeFirst(char *, const char);



int main()
{
    char string[MAX_SIZE];
    char toRemove;

    printf("\nEnter any string: ");
    gets(string);

    printf("\nEnter character to remove from string: ");
    toRemove = getchar();

    removeFirst(string, toRemove);

    printf("\nOutput : [ %s ]\n", string);

    return 0;
}



/**
 * Function to remove first occurrence of a character from the string.
 */
void removeFirst(char * string, const char toRemove)
{
    int i;
    int len = strlen(string);

    i=0;

    /* Run loop until the first occurrence of the character is not found */
    while(i<len && string[i]!=toRemove)
        i++;

    /*
     * Shift all characters right to the position found above to one place left
     */
    while(i<len-1)
    {
        string[i] = string[i+1];
        i++;
    }

    /* Make the last character null */
    string[i] = '\0';
}

Output:

/*  C program to Delete first occurrence of character in a string  */

Enter any string: Hello CodezClub

Enter character to remove from string: C

Output : [ Hello odezClub ]

Process returned 0

Above is the source code for C program to Delete first occurrence of character in a string which is successfully compiled and run on Windows System.The Output of the program is shown above .

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