1. The document discusses the printf() and scanf() functions in C for output and input. It explains how to use format specifiers in printf() such as %d, %f, %c, %s. 2. It also explains how to use scanf() to input values from the keyboard by specifying the address of the variable using &. 3. An example is given showing how to use scanf() to input an integer and float and then print them out.

1. กF Printf();
Printf();
Scanf();
Scanf();
ก ก กก

2. ก ก F
printf F
scanf F F ก F F
printf scanf ก ก F F stdio.h กF F
กF printf scanf F F
#include<stdio.h>

3. กF printf()
printf()
printf() ก F
1. F ก
printf( F );
F printf( Hello world );
2. ก
printf( ก , );
F
F printf( My age is %dn , myAge);

4. ก
format code
%d ก (int, short, unsigned short, long, unsigned
long
%u ก ก (unsigned short, unsigned long
%o ก ก
%x ก ก ก
%f ก (float, double, long double)
%e ก ก E ( e) กก (float,
double, long double)
%c ก ก 1 (char)
%s ก F (ก กก F 1 )
%p ก F (pointer)

5. F
main()
{
int i =12345;
float x=350.875;
printf( %dn ,i);
printf( %fn ,x);
}

6. F
12345
350.875000

7. กF scanf();
scanf();
Scanf( ) ก F F ก F
• กF F C
ก ก scanf( )
• F ก keyboard F ก F
F F (memory address )
ก ก F function scanf( ) F F F
F (address) F F
function scanf( )

8. ก F กF scanf();
scanf();
scanf( format string , &variable);
1. format string Fก ก ก
F
2. &variable ( ก F F ก
F ) F Fก F F
&name

9. F ก F กF scanf();
scanf();
F F
F
int month ,year;
scanf( %d %d , &month, &year);
ก ก F F
int i;
float x;
scanf( %d %f ,&i,&x);

10. F
#include<stdio.h>
#include<conio.h>
int main()
{
int year;
float salary;
clrscr();
printf(“Insert year experience and salary : ”);
scanf(“%d %f”,&year,&salary);
printf(“You worked for %d years.n”,year);
printf(“Your salary is %.2fn”,salary);
return(0);
}