int main()
{
int a;
char b[20];
char c[20];
printf("\nenter the value of b:");
scanf("%[^\n]",b);
printf("\nb=%s",b);
printf("\nenter the value of a:");
scanf("%d",&a);
printf("\na=%d",a);
printf("\n enter the values of c:");
scanf("%[^\n]",c);
printf("\nc=%s",c);
return 0;
}
the output i m gettin is:
enter the value of b:a
b=a
enter the value of a:1
a=1
enter the values of c:
c=?
the program does not wait to accept the value of c and just prints what ever value it holds.
can ny one help me out with this.....
int main()
{
int a;
char b[20];
char c[20];
printf("\nenter the value of b:");
scanf("%[^\n]",b);
printf("\nb=%s",b);
printf("\nenter the value of a:");
scanf("%d",&a);
printf("\na=%d",a);
printf("\n enter the values of c:");
you have instructed scanf to read for the variable
except "\n" but "\n" is still there in the buffer,
hence for concurrent reads of the same datatype
flush the "\n" (buffer) before you could proceed ...
to read the next variable's value
hi,
First, fflush on stdin is not guaranteed. Some ppl might suggest you to use getchar to flush the stdin. But again that is not a clean way, i think so.
There are other options like using the gets (or fgets which is secure ) then convert the input to whatever format you want using the sscanf (string scanf). At the moment I would suggest you to use fgets and sscanf. However in instance where you want a key board input such that you dont want to wait for the enter key, for eg, u want something to happen when a user types in 'q' ( for eg) without having to press the enter key after typing q, ( this is called as hotkey) you may want to write your own keyboard handling function, I use the one below sometimes, this is for unix system. for windows, it will be different.
I have also added the main function to this function so you can better understand how mygetch works:
Last edited by blowtorch; 12-23-2006 at 01:42 PM..
Thanks for this code snippet. Could you please help me what if I have to do both simultaneously like in shell when Ctrl+l is pressed it clears the screen and the shell waits for the input also when it is a long command.
I don't know if you guys get this problem sometimes at Terminal but I had been having this problem since yesterday :( Maybe I overdid the Terminal. Even the codes that used to work doesn't work anymore.
Here is what 's happening:
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#include <stdio.h>
#include <stdlib.h>
struct Student {
int studentNumber;
int phoneNumber;
char *studentName; //line 7
// char studentName; //line 8
};
int... (10 Replies)
$ cc Array.c
Array.c: In function ‘main’:
Array.c:23: warning: passing argument 1 of ‘scanf’ makes po
Array.c:25: error: expected expression before ‘return’
Array.c:29: error: expected expression before ‘return’
Array.c: At top level:
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Im a newbie to programming language, i found tat there r these function called printf and putchar() as well as scanf and getchar(), im curious abt why do dey hav these 2 different function although dey r doing the same instruction? :confused: (13 Replies)
I don't know how to do this:
printf("creazione nuovo messaggio\n");
printf("insert dest\n");
scanf("%s",dest);
printf("insert object\n");
scanf("%s",ogg);
printf("inserire text\n");
scanf("%s",test);
... (7 Replies)
1) when user login to the server the session got colosed. How will resolve?
2) While firing the command ls -l we are not able to see the any files in the director. but over all view the file system using the command df -g it is showing 91% used. what will be the problem?
Thanks in advance. (1 Reply)
Hello everyone,
I hope someone is awake to help me on this..
hey How can I do something like this:
The user is asked is asked to enter an int value, but I want to provide a default value on stdout, which they can back space and change it to whatever they want..
for e.g:
Enter the... (4 Replies)
hi all
i have a program in C (Unix Solaris 5.7) and i want to read a string from keyboard, but the "scanf" doesn´t reads spaces.
example:
....
char name;
....
printf("Enter your name: ");
scanf("%s",&name);
printf ("Your name is: %s", name);
and if i write Kevin Costner ... (4 Replies)
hi i am a beginner to C
i have encountered a problem with my assignment, and i have researched it on the internet, but unfortunately i didn't find anything related to that.
i am writing a simple program that takes user's input by prompt command, and parse the whole line into an array of... (1 Reply)
I have a problem reading characters from keyboard with the scanf function.
Here there is a little piece of code:
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
/* The last 3 libraries are included because in the real program I use some... (4 Replies)