#include  #include  #include  void main() {    int i,j,keylen,msglen;    char input[100], key[30],temp[30],quot[100],rem[30],key1[30];    clrscr();    printf("Enter Data: ");    gets(input);    printf("Enter Key: ");    gets(key);    keylen=strlen(key);    msglen=strlen(input);    strcpy(key1,key);    for (i=0;i0;j--) {            if(temp[j]==key[j])             rem[j-1]='0'; else             rem[j-1]='1';        }        rem[keylen-1]=input[i+keylen];        strcpy(temp,rem);    }    strcpy(rem,temp);    printf("\nQuotient is ");    for (i=0;i