I wrote a small program that checks if the input is a char between a-z and A-Z, I wanted to practice functions so I made a function called int check; which should return a value for the while loop (if the input is wrong it's suppose to ask to ask for another input again)
#include <stdio.h>
int check(char a, char b);
int main()
{
char a, b;
int flag = 1;
printf("enter two characters\n");
scanf("%c%c", &a, &b);
flag = check(a, b);
if (flag != 0)
{
while (flag)
{
printf("enter two characters\n");
scanf("%c%c", &a, &b);
flag = check(a, b);
}
}
printf("worked");
}
int check(char a, char b)
{
int counter=0;
if ((a >= 'a' && a <= 'z') || (a >= 'A' && a <= 'Z')) counter++;
if ((b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z')) counter++;
if (counter == 2) return 0;
else return 1;
}
now when I run it it works fine, but for some reason when I input a wrong number twice the first time it asks me to "enter two characters" and on the second time it just skips the scanf and prints twice " enter two characters" does anybody knows why? thanks!
