Remove all Characters in Second String which are present in First String

#include

#include

#include

#include

#define char_size 26

void alphacheck(char *, int []);

void create(char [], char [], int[]);

int main()

    char str1[50], str2[50];

    int a1[char_size] = {0};

    char str2_rem[50];

    clrscr();

    printf("Enter string1: ");

    scanf("%s", str1);

    printf("Enter string2: ");

    scanf("%s", str2);

    alphacheck(str1, a1);

    create(str2_rem, str2, a1);

    printf("On removing characters from second string we get: %s\n", str2_rem);

    return 0;

void alphacheck(char *str, int a[])

    int i, index;

    for (i = 0; i < strlen(str); i++)

        str[i] = tolower(str[i]);

        index = str[i] - 'a';

        if (!a[index])

            a[index] = 1;

    printf("\n");

void create(char str_rem[], char str[], int list[])

    int i, j = 0, index;

    for (i = 0; i < strlen(str); i++)

        index = str[i] - 'a';

        if (!list[index])

            str_rem[j++] = str[i];

    str_rem[j] = '\0';

 getch();

Output

Enter string1: programming

Enter string2: computer

On removing characters from second string we get: cute

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