Babify

babify.c

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

int main(int argc, char** argv) {
	const int EXIT_OK = 0;
	const int EXIT_BADUSAGE = -1;
	
	if (argc != 2) {
		printf("Usage: babify [STRING]\n");
		return EXIT_BADUSAGE;
	}
	
	char* message = argv[1];
	char* newMessage = malloc(strlen(message) + 1); // Plus one for null terminator
	for (int i = 0; i < strlen(message); i++) {
		char msgChar = message[i];
		char newMsgChar;
		
		if (msgChar == 'r' || msgChar == 'l') newMsgChar = 'w';
		else newMsgChar = msgChar;
		
		newMessage[i] = newMsgChar;
	}
	
	newMessage[strlen(message)] = 0; // Null terminator
	printf("%s\n", newMessage);
	free(newMessage);
	
	return EXIT_OK;
}