Question

** in C language please

Write a function that remove a substring of str beginning at index idx and length len.
// param str: the string being altered
// param idx: the starting index of the removed chunk
// param len: the number of characters to remove (length of sub>
// removed) assumptions:
// 0 <= idx
// str is a valid string that terminates properly
//

// TODO: complete the function
void remove_substr(char str[], int idx, int len) {

Answer 1

code with comments in c (code to copy)

#include <stdio.h>
#include <stdlib.h>
// param str: the string being altered
// param idx: the starting index of the removed chunk
// param len: the number of characters to remove (length of sub>
// removed) assumptions:
// 0 <= idx
// str is a valid string that terminates properly


// TODO: complete the function
void remove_substr(char str[], int idx, int len) {
        // get the starting index i and the ending index j of the substring to  remove
        int i=idx, j=idx+len;
        //In a loop we will copy j to i until we reach the end of the string
        while(str[j]!='\0'){
                //copy character at j to i and increment i and j
                str[i++]=str[j++];
        }
        //terminate the string
        str[i]='\0';
}
//driver to test our function
int main()
{
        char str[] = "Have a good and exciting day!";
        remove_substr(str, 12, 13);
        printf("remove_substr(\"Have a good and exciting day!\") = \"%s\"", str);
}

code screenshot in c

Sample Console Output Screenshot

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