Thread: getchar

I am getting mad. I don't know why this isn't working It always repeats? I feel like an idiot

Code:

#include <stdio.h>
#include <stdlib.h>

int main(void){
        int input;
        do{
        printf("1.  Add person\n");
        printf("2.  Remove Person\n");
        printf("3.  View List\n");
        printf("4.  Exit");
        input=getchar();
        }
        while(input!='1' || input!='2' || input!='3' || input!='4');
        if(input=='4'){
                printf("Exiting. . .\n");
                exit(0);
        }
        return 0;
}

thanx both of ya'll were right here it is now

Code:

int main(void){
        int input;
        do{
        printf("1.  Add person\n");
        printf("2.  Remove Person\n");
        printf("3.  View List\n");
        printf("4.  Exit");
        input=getchar();
        FLUSH;
        }
        while(input<'1' || input>'4');
        if(input=='1')
                add_person();
        /*other if's to come*/
        if(input=='4'){
                printf("Exiting. . .\n");
                exit(0);
        }
        return 0;
}

and FLUSH is defined as

Code:

#define FLUSH  while(getchar()!='\n' && getchar()!=EOF)

#define FLUSH while(getchar()!='\n' && getchar()!=EOF)

You have two calls to getchar() here which would be problematic, because the second call misses the first variable from the first call.

You'll need to save the variable and then do the tests on it.
eg.

Code:

int val;
val = getchar();
if (val == '\n' || val == EOF )
{
   // Do whatever
}

thanx. I got it changed