📄 program3_05.c
字号:
/* Program 3.5 Testing letters the easy way */
#include <stdio.h>
#include <ctype.h>
int main(void)
{
char letter =0; /* Stores an input character */
printf("Enter an upper case letter:"); /* Prompt for input */
scanf(" %c", &letter); /* Read the input character */
if ((letter >= 'A') && (letter <= 'Z')) /* Verify uppercase letter */
{
letter += 'a'-'A'; /* Convert to lowercase */
printf("You entered an uppercase %c.\n", letter);
}
else
printf("You did not enter an uppercase letter.\n");
return 0;
}
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