Remove all characters in first string which are present in second string

Posted on Apr 22, 2020

C program to remove all characters in first string which are present in second string.

Program

#include<stdio.h>
#include<conio.h>
#include<string.h>
#define MAX 50

void main()
{
	char str1[MAX], str2[MAX];
    int i, j, k, len1, len2;

    printf("Enter the first string\t:");
    gets(str1);

    printf("Enter the second string\t:");
    gets(str2);

    len1 = strlen(str1);
    len2 = strlen(str2);


    for(i=0;i<len1;i++)
    {
       for(j=0;j<len2;j++)
       {
           if(str1[i] == str2[j])
           {
               for(k=i;k<len1;k++)
               {
                   str1[k] = str1[k+1];
               }
               len1--;welcome
           }
       }
    }

    str1[len1] = '\0';

    printf("\nModified string\t:%s",str1);

    getch();
}

Output

Enter the first string  :welcome to coursecrux.com
Enter the second string :hello

Modified string :wcm t curscrux.cm