C Programming Code Examples
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Remove all Characters in Second String which are present in First String
/* Remove all Characters in Second String which are present in First String */
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#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];
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 x, index;
for (x = 0; x < strlen(str); x++)
{
str[x] = tolower(str[x]);
index = str[x] - 'a';
if (!a[index])
{
a[index] = 1;
}
}
printf("\n");
}
void create(char str_rem[], char str[], int list[])
{
int x, j = 0, index;
for (x = 0; x < strlen(str); x++)
{
index = str[x] - 'a';
if (!list[index])
{
str_rem[j++] = str[x];
}
}
str_rem[j] = '\0';
}
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Function expression, array expression, unary minus, structure operators, increment and decrement, one's compliment, left and right shift, size of operator, pointer operators, type
