write the function. if all the character in string B appear in
string A, return true, otherwise return false.

Answer Posted / somisetty

char B_str[] = "aaaaaa";
char A_str[] = "a"
// For the above case, this function should return true

char B_str[] = "aB";
char A_str[] = "aaaaaBaaaaaa"
// For the above case, this function should return true

int B_chars[256]; //for all unique chars in B_str

/* Init B_chars[] */
for( int i = 0; i < 256; i++ )
B_chars[i] = 0;

/* Get characters in B_str */
for( int i = 0; i < strlen(B_str); i++ )
B_chars[(int) B_str[i]]++;

/* check if A_str has which of them */
for( int i = 0; i < strlen(A_str); i++ )
B_chars[(int) A_str[i]] = 0;

/* If any of the B_chars[] has non-zero entry */
for( int i = 0; i < 256; i++ )
{
if( B_chars[i] != 0 )
{
return (false);
}
}

/* Otherwise return true */
return (true);

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