How to find the Characters in the First String that are not Present in the Second String in C - Step by Step Examples

How to find the Characters in the First String that are not Present in the Second String in C ?

Answer

To find the characters in the first string that are not present in the second string in C, you can use arrays and loops.

✐ Examples

1 Find Characters Not Present in Second String

In this example,

We create two character arrays named str1 and str2 with different values.
We iterate through each character in str1 and check if it is present in str2.
If a character is not present in str2, we add it to the result array.
Finally, we print the result array to show characters not present in the second string.

C Program

// Find Characters Not Present in Second String
#include <stdio.h>
#include <string.h>
int main() {
  char str1[] = "Hello World";
  char str2[] = "apple";
  char diff[20];
  int k = 0;
  for(int i = 0; i < strlen(str1); i++) {
    int j;
    for(j = 0; j < strlen(str2); j++) {
      if(str1[i] == str2[j])
        break;
    }
    if(j == strlen(str2)) {
      diff[k] = str1[i];
      k++;
    }
  }
  diff[k] = '\0';
  printf("Characters not present in second string: %s\n", diff);
  return 0;
}

Output

Characters not present in second string: Ho Word

Summary

In this tutorial, we learned How to find the Characters in the First String that are not Present in the Second String in C language with well detailed examples.

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