I have recently started learning I/O file operations in C. And in this code I am facing an issue the while loop is not exiting even when I put nonwhite space character ' ' . Plz, tell me where I am wrong and how to exit while loop.
#include <stdio.h>
int main()
{
char a = 0;
while ((a = (char)getchar()) != ' ');
ungetc(a, stdin);
printf("\n Value of A is %c", a);
return 0;
}
The getchar function returns an int for a reason. It can either return a character if there is one, or EOF to indicate the end of your input stream. So using a char variable to store the result is not a good idea.
Then, you should also always test for EOF and act accordingly if you encounter this condition.
Also, usually these streams are line buffered, so you woudn't see any input until you enter a whole line.
