Swap of two numbers program in C
This is our first program
in C programming language. This C program
will print the text
“Hello World!” on the console output screen.
In this post we will learn how to
write a C Program and explore each statements
in this C Program and many more.
/*Swap of two numbers*/
#include<stdio.h>
#include<conio.h>
#include<conio.h>
int main()
{
int num1,num2;
clrscr();
printf("Enter the first number :”);
scanf("%d",&num1);
printf("Enter the second number :”);
scanf("%d",&num1);
printf("Before swapping first number :%d\n”,num1);
printf("Before swapping second number :%d\n”,num2);
/*logic of swapping*/
num1=num1+num2;
num2=num1-num2;
num1=num1-num2;
printf("After swapping first number :%d\n”,num1);
printf("After swapping second number :%d\n”,num2);
int num1,num2;
clrscr();
printf("Enter the first number :”);
scanf("%d",&num1);
printf("Enter the second number :”);
scanf("%d",&num1);
printf("Before swapping first number :%d\n”,num1);
printf("Before swapping second number :%d\n”,num2);
/*logic of swapping*/
num1=num1+num2;
num2=num1-num2;
num1=num1-num2;
printf("After swapping first number :%d\n”,num1);
printf("After swapping second number :%d\n”,num2);
getch();
return(0);
}
Output:
Enter the first number :11
Enter the second number :34
Before swapping first number :11
Before swapping second number :34
Before swapping first number :34
Before swapping second number : 11
Explanation Of Each Statements In The Program:-
Output:
Enter the first number :11
Enter the second number :34
Before swapping first number :11
Before swapping second number :34
Before swapping first number :34
Before swapping second number : 11
Explanation Of Each Statements In The Program:-
To learn any programming language, practical is must important
than others factors. First of
all we learn and understand the language and then
we implements, each things related to
the language and explore about it. After
all we are interested in making products (Software)
by using that language.
Every programmer and learner first of all print Hello
world! Program while they start learning
a programming language. So we are going to
print Hello World! on the console output
screen.
#0: \*First program in C to print Hello World! text the console output screen */
This statement are called comment. We write comment in C programming language by using /* */ this symbols and
writes somethings message within these symbols. We write the
comment about program and statement of that program to remember written
statements and logic after sometimes. The comments have lot’s advantages in the
programming, we
will learn more about comments in the others post.
#1: #include <stdio.h>
stdio.h is called header file which contains declarations of
standard input, output related
library functions of the C programming language, this statement is write here
to tells the
compiler to include the declarations
of all standard input, output library functions which are
stored inside the
header file stdio.h. We will learn more about
header file in the other post.
#2:
int main()
main is a
pre-declared functions in the C language which is defined by the programmer
while
writing a program, to run or execute the program.The main function
is declared in the
C language but we can define in our way. The main function is necessary to
execute or run
the program, without main function we
cannot execute our program. The main function is
starting point to the start executing our program. We will learn more about function and their declaration in the others post.
#3:
printf(“Hello World!”);
“Hello World!” is sequence
of the characters that are called string in the C
programming
language that are pass to the printf function to display text "Hello World!" on the console
output screen(monitor). printf
is a library function that is responsible to display text on the
standard output
device in the C programming language. printf function is declared in header
file stdio.h. Will will learn more about input and output related function
in the other post.
#4: { }
These
symbols are used to create blocks of function, if ,if-else, looping,
switch, structure ,union others statements in the C programming
language. The block are collection of codes
or statements to a particular function and others statements.
#5: return 0;
return (0);this
statement is returning the control of this program to the calling function or
system that is our operating
system because main function is called by
the operating system in the C programming language. We will learn more about calling function in the
others post. with value 0 return
value 0 represent that’s program’s execution complete
successfully.
