The document discusses input and output functions in C programming such as printf(), scanf(), getch(), and getchar(). It provides formatting specifiers for different data types used in printf and scanf. Examples are given to demonstrate how to use format specifiers, escape sequences, and input functions correctly. Common errors with scanf are also discussed.

1. 3
C
C
Standard
Output File Standard Input File 3-1
3-1
Standard Input
File Buffered
Standard Output
File
C printf
Printf (“[ ”,[

2. 3–2 Output
Input Output 3 -1
3–1
char - c %c
short int h d %hd
int - d %d
long int I or L d %Ld
float - f %f
double - f %f
long doule L f %Lf
%[
3- 2
3 -2
%d %4d
12 12 12
123 123 123
1234 1234 1234
12345 12345 12345
float
%[

3. printf(“%7.2f”,23.35000);
5 4
1 2
23.35
1. printf(“%d%c%f”,23, „z‟,4.1);
23z4.100000
2. printf(“%d %c %f”, 23. „z‟, 4.1);
23 z 4.100000
1
3. int num1 = 23;
char zee = „z‟;
float num2 = 4.1;
printf(“%d %c %f”, num1, zee, num2);
23 z 4.100000
4. printf(“%dt%ct%5.1f”, 23, „z‟, 14.2);
printf(“%dt%ct%5.1f”, 107, „A‟, 53.6);
printf(“%dt%ct%5.1f”, 1754, „F‟, 122.0);
printf(“%dt%ct%5.1f”, 3, „P‟, 0.1);
23 z 14.2
107 A 53.6
1754 F 122.0
3 P 0.1
5. printf(“The number is %6d”, 23);

4. The number is 23
C
Back-slash character 3-3
3-3 Back-slash character
„0‟ Null Character
„a‟ Alert
„b‟ Backspace
„t‟ Horizontal
„n‟ Newline
„v‟ Vertical tab
„f‟ Form feed
„r‟ Carriage return
„‟ Single quote
„”‟ Double quote
„‟ Backslash
1. printf(“%d %d %dn”, 44, 55);
44 55 0
3 2
2. printf(“%d %dn”, 44, 55, 66);
44 55
2 3 3
3. long int x = 444446766;
printf(“%dn”, x);
-18386
Ld
C scanf

5. Scanf(“[ ”,[
3-3
Enter
Error
1. 214 156 14z
scanf(“%d%d%d%c”, &a, &b, &c, %d);
14 z c
scanf(“%d%d%d %c”, &a, &b, &c, %d);
2. 2314 15 2.14
scanf(“%d %d %f”, &a, &b, &c);
3. 14/26 25/66
scanf(“%2d/%2d %2d/%2d”, &num1, &num2, &num3, &num4);
4. 11-25-56
scanf(“%d-%d-%d”,&a, &b, &c);
1. int a = 0;
scanf(“%d”,a);
printf(“%d/n”,a);

6. 234 (Input)
0 (Output)
& a
error
2. float a = 2.1;
scanf(“%5.2f”,&a);
printf(“%5.2f”,a);
3. int a;
Int b;
scanf(“%d%d%d”,&a, &b);
Printf(“%d %d/n”, a, b);
5 10 (Input)
5 10 (Output)
3 2 scanf
2 3
conio.h
getch 1
Enter
ch = getch();
getche getch
ch = getch();
getchar 1
Enter

7. ch = getchar(0;
3-1 “Nothing”
3-1 “Nothing”
3-2

8. 3-2