Search and Replace

//
//  main.c
//  This module displays how to search and replace a char
//  in a char array by iteration through the char array
//
//  Created by Rob Hunter on 10/24/18.
//  Copyright © 2018 Rob Hunter. All rights reserved.
//

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

int change(char*, char, char);

int main () {
    char x[] = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'x', 't', 'f', 'm', 'x', 't', 'y'};
    char changeFrom = 'x';
    char changeTo = '*';
    int count;
    
    /* change chars from changeFrom to changeTo in char array x */
    count = change(x, changeFrom, changeTo);
    
    printf("String had %d char \'%c\' that were changed to \'%c\'\n\n", count, changeFrom, changeTo);
    
    return 1;
}


/* change char variable y in char array x to char z */
int change(char *x, char y, char z) {
    
    int i, count = 0;
    char *test = x;
    
    /* compare characters to y, if test == y change to z */
    while ((test = strchr(x, y))) {
        count++;
        *test = z;
        test++;
    }
    
    /* print string x */
    for(i = 0; i < strlen(x) - 1; i++) {
        printf("%c ", x[i]);
    }
    /* new line */
    printf("\n\n");
    
    return count;
}