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

char * concatenate(const char * string1, const char * string2);

int main(int argc, const char * argv[]) {
    char str1[100] = "The United States";
    char str2[100] = "of America";
    
    printf("First string: %s\n", str1);
    printf("Second string: %s\n", str2);
    
    char * str3;
    
    str3 = concatenate(str1, str2);
    
    printf("\nThe two strings concatenated: %s\n", str3);
    
    
    char str4[100] = "The University of North Carolina";
    char str5[100] = "at Charlotte";
    
    printf("\nFirst string: %s\n", str4);
    printf("Second string: %s\n", str5);
    
    char * str6;
    
    str6 = concatenate(str4, str5);
    
    printf("\nThe two strings concatenated: %s\n", str6);
    
    return 0;
}