#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<malloc.h>
char *strsqz (char ch1[], char ch2[]);
void main()
{
    char static ch1[256],
    char temp[256],ch2[256];
    char  * ch3;
    printf("Please enter the first string: \n");
    gets(temp);
    ch3=(char*)malloc(sizeof(ch3)*strlen(temp));
    printf("Please enter the second string: \n");
    gets(ch2);
    if((strcmp(temp,"")==0)||(strcmp(temp,NULL)==0))
        ch3=strsqz (ch1, ch2);
    else
      ch3=strsqz (temp, ch2);
    puts(ch3);
}
char *strsqz ( char ch1[], char ch2[])
{
  int chLen=strlen(ch1),i;
  int writeIndex=0;
  char *temp=(char*)malloc(sizeof(temp)*chLen);
  for(i=0;i<chLen;i++)
  {
    if(strchr(ch2,ch1[i])==NULL)
    {
        temp[writeIndex]=ch1[i];
        writeIndex++;
    }
  }
  temp[writeIndex]='\0';
  return temp;
}