So this is my code:
#include <stdio.h>
#define SIZE 10
int main(void)
{
int x,p[SIZE],i=0;
printf("type some charactersn");
while((x = getchar()) != EOF && i<SIZE)
{
if(x<'0' || x>'9')
{
p[i]=x;
i++;
}
else
{
printf("this number is not valid %dn",i);
}
}
for(i=0;i<SIZE;i++)
{
putchar(p[j]);
}
return 0;
}
when you type a “number character” it is suppose to not add to the counter but instead of doing that it add 1 when i type in a number character and adds 2 when i add in any other time of character.
7
You are typing one character per line, with a Return/Enter after each character. Each time you do that, the program receives two characters: The first character you typed and a newline character for the Return/Enter.
Since two characters are sent, the program executes two iterations of the loop. With a digit character, the program prints the “not valid” message for the digit and enters the newline character in the array, thus advancing i by 1. With a non-digit character, the program enters both that character and the newline character in the array, thus advancing i by 2.
If you want the user to enter the input that way, you need to modify the program to ignore newline characters.
1