Input Output

1. Dinesh Maharjan, 2022
Programming in C
Input Output
Instructor: Dinesh Maharjan
2022

9. #include<stdio.h>
void main(){
printf("Name:tt "Dinesh"");
printf("nMobile No:tt 9841429635");
printf("nSection: tt D");
printf("a");
printf("n");
printf("HellorNepal");
}
Escape Sequence

16. Place Holder Data Type Displayed
%i , %d int, long, short, char,
unsigned int
Decimal Value, ASCII
value
%u Unsigned int Decimal Value
%o Int Octal Value
%x, %X Int Hexadecimal
%f Float Float value with zeros
%g %G Float, Double Float value with no zeros
%e, %E Float, Double Float in exponent
%lf Double Double value
%c Char Single character
%s Array of Character String

17. #include<stdio.h>
void main(){
printf("Decimal No =%5d",123);
printf("nOctal No =%5o",123);
printf("nHex No =%5x",123);
printf("nFloat with g =%5g",123.456);
printf("nFloat with f =%5f",123.4560);
printf("nFloat with f =%5.1f",123.4560);
printf("nFloat with lf =%5lf",123.456);
printf("nFloat with e =%5e",123.456);
printf("nSingle Char = %5c",'A');
printf("nString %5s","Hello");
}
printf
Decimal No = 123
Octal No = 173
Hex No = 7b
Float with g =123.456
Float with f =123.456000
Float with f =123.5
Float with lf =123.456000
Float with e =1.234560e+002
Single Char = A
String Hello

18. #include<stdio.h>
void main(){
int a=45;
int *ptr=&a;
unsigned int b=56;
printf("Address of a in decimal =%dn",&a);
printf("Address of a in hexadecimal =%xn",&a);
printf("Content of pointer =%p",ptr);
printf("Decimal No =%d",b);
}
Address of Variable

29. • Single character
• #include<stdio.h>
• void main(){
• char ch;
• ch=getchar();
• putchar(ch);
• }
getchar(), putchar()

30. • When we use %s for scanf,
it only scans string before
white space
• White spcace can be space,
tab or new line
scanf() for string
#include<stdio.h>
void main(){
char sen[50];
scanf(“%s”,sen);
printf(sen);
}

31. scanf() for string
#include<stdio.h>
void main(){
char sen[50];
scanf(“%[^n]”,sen);
printf(sen);
}
• Reads data even after
white space also

32. getc() and putc()
#include<stdio.h>
void main(){
char ch;
ch=getc(stdin);
putc(ch,stdout);
}
• Reads single
character from
specified source
• Write single
character to specified
resource

33. getch()
#include<stdio.h>
void main(){
char ch;
ch=getch();
putchar(ch);
}
• Non standard function
• Not part standard C
• Defined in conio.h
• getch() reads a single
character without enter
• It does not echo the
input character.

34. getche()
#include<stdio.h>
void main(){
char ch;
ch=getche();
putchar(ch);
}
• Non standard function
• Not part standard C
• Defined in conio.h
• getche() reads a single
character without enter
• It echos the input
character.

35. gets() and puts()
#include<stdio.h>
void main(){
char sen[50];
gets(sen);
puts(sen);
}
• gets() can read
sentence.
• puts() can write
sentence.

40. Symbolic Constant
#include<stdio.h>
#define PI 3.14
void main(){
double r,area,peri;
puts("Enter the radius");
scanf("%lf",&r);
area=PI*r*r;
peri=2*PI*r;
printf("Area =%.2f",area);
printf("nPerimeter=%.2f",peri);
}