C 문자열 처리 strcmp, strcat, strlen, strncpy

#include <stdio.h>

// Needed for exit()
#include <stdlib.h>

// Needed for strcmp, strcat, strlen, strlcpy -> strncpy
#include <string.h>

void main(void){
printf("\n");

char wholeName[12] = "Derek Banas";

int primeNumbers[3] = {2, 3, 5};
int morePrimes[] = {13, 17, 19, 23};

printf("The first prime in the list is %d\n\n", primeNumbers[0]);

char thirdCity[] = "Korea";
char yourCity[30];

printf("What city do you live in? ");
fgets(yourCity, 30, stdin);
printf("Hello %s\n\n", yourCity);

for(int i = 0; i < 30; i++){
if(yourCity[i] == '\n'){
yourCity[i] = '\n';
break;
}
}
printf("Hello %s\n\n", yourCity);
printf("Is your city Kores? %d\n\n", strcmp(yourCity, thirdCity));

char yourState[] = ", Korea";
strcat(yourCity, yourState);

printf("You live in %s\n\n", yourCity);

strncpy(yourCity, "Jera NamDo HeaNam", sizeof(yourCity));
printf("New City is %s\n\n", yourCity);
}