#include <stdio.h>
#include <ctype.h>
 
#define SIZE 100
 
int main(void)
{
    char s[SIZE];
 
    printf("Enter a line of text: ");
    fgets(s, SIZE, stdin);
 
    printf("\nThe line in uppercase is:\n");
 
    for (int i = 0; s[i] != '\0'; ++i)
    {
        printf("%c", toupper((unsigned char)s[i]));
    }
 
    printf("\nThe line in lowercase is:\n");
 
    for (int i = 0; s[i] != '\0'; ++i)
    {
        printf("%c", tolower((unsigned char)s[i]));
    }
 
    return 0;
}

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