Write a C program that uses functions to delete n Characters from a given position in a given string.

//delete n Characters from a given position in a given string.
#include <stdio.h>
#include <string.h>

int main() {
    char str[100];
    int position, n;
    void deleteCharacters(char [], int , int );

    printf("Enter a string: ");
    scanf("%[^\n]%*c", str);  
    
    printf("Enter the position from where you want to delete: ");
    scanf("%d", &position);

    printf("Enter the number of characters to delete: ");
    scanf("%d", &n);

    // Call the function to delete characters
    deleteCharacters(str, position, n);

    // Output the modified string
    printf("Modified string: %s\n", str);

    return 0;
}

// Function to delete n characters from a given position in a string
void deleteCharacters(char str[], int position, int n) {
    int length = strlen(str);
    
    // Check if the position is valid
    if (position < 0 || position >= length) {
        printf("Invalid position!\n");
        return;
    }

    // Check if the number of characters to delete is valid
    if (n < 0 || position + n > length) {
        printf("Invalid number of characters to delete!\n");
        return;
    }

    // Shift the remaining characters to the left to overwrite the deleted part
    for (int i = position-1; i < length - n; i++) {
        str[i] = str[i + n];
    }
    
    // Null-terminate the string after deletion
    str[length - n] = '\0';
}

Enter a string: Study at a Glance
Enter the position from where you want to delete: 6
Enter the number of characters to delete: 6
Modified string: StudyGlance

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