Question

How to extract only characters from char array in C

Answer 1

#include <stdio.h> 
#include <string.h> 
#include <stdlib.h> 
#include <ctype.h> 

void extract_characters(char *s, int len, char *chars) { 
	int chars_i = 0;
	
    for (int i = 0; i < len; i++) { 
        char ch = s[i]; 
        if (isalpha(ch)) 
            chars[chars_i++] = ch; 
    } 
	chars[chars_i] = '\0';
} 
   
int main() 
{ 
    char arr[] = "c++$vb.net&%java*() php <>/python 3.7.3"; 
	char *chars = (char *)malloc(strlen(arr) + 1 * sizeof(char));
	
    extract_characters(arr, strlen(arr), chars);
	
	puts(arr);
	puts(chars);
	
	free(chars);
     
    return 0; 
} 
   
   
   
/*
run:
   
c++$vb.net&%java*() php <>/python 3.7.3
cvbnetjavaphppython
 
*/

 

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