C LANGUAGE - PART 1 EXAMPLES

C Programming - Fundamentals

Prepared By C.SaravanaKumar

• Ex 1 : My First Basic Program -I
• Ex 2 : My First Basic Program -II
• Ex 3 : My First Basic Program -III
• Ex 4 : Integer & Float Converstion
• Ex 5 : Floating Point Error..
• Ex 6 : Variable Declaration
• Ex 7 : Working With Variable
• Ex 8 : Integer Variable With Scanf-I
• Ex 9 : Integer Variable With Scanf-II
• Ex 10 :Integer Variable With Scanf-III
• Ex 11 :Integer Variable With Scanf-IV
• Ex 12 :Character Variable Declaration
• Ex 13 :String Variable With Scanf Function
• Ex 14 :String Variable With gets Function
• Ex 15 :Combine all Variables
• Ex 16 :Print Employee Information with gotoxy function

Example : 1 Write a Program to print "Hello"

#include<stdio.h>
#include<conio.h>
void main()
{
/*My First Program - Comment Line */
clrscr();
printf("Hello");   
getch();
}

Output :

Hello

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Example : 2

#include<stdio.h>
#include<conio.h>
void main()
{
clrscr();
printf("Hello\nWelcome");
printf("\nGoldenjrsinfo");
printf("-My Web");
getch();
}

Output :

Hello
Welcome
Goldenjrsinfo-MyWeb

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Example : 3

#include<stdio.h>
#include<conio.h>
void main()
{
clrscr();
printf("\nHello 12");    
printf("\n%d");       
printf("\n%d",100);
printf("\nA=%d",100);
printf("\nA=%d+10",100);
printf("\nA=%d",100+10);
getch();
}

Output :

Hello 12
0
100
A=100
A=100+10
A=110

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Example : 4 Integer & Float Conversions (5/2)

#include<stdio.h>
#include<conio.h>
void main()
{
clrscr();
printf("\n1-> %d",5/2);
printf("\n2-> 5/2 = %d",5/2);           

/* printf("\n5/2 = %f",5/2); This Line is Error */

printf("\n3-> 5.0/2 = %d",5.0/2);   
printf("\n4-> 5/0/2 = %f",5.0/2);     
printf("\n5-> 5.0/2 = %.2f",5.0/2);   
printf("\n6-> 5/2.0 = %.2f",5/2.0);    
printf("\n7-> 5.0/2.0=%.2f",5.0/2.0);
getch();
}

Output :

1-> 2
2-> 5/2 = 2
3-> 5.0/2 = 0
4-> 5/0/2 = 2.500000
5-> 5.0/2 = 2.50
6-> 5/2.0 = 2.50
7-> 5.0/2.0=2.50

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Example : 5 Floating Point Error....

#include<stdio.h>
#include<conio.h>
void main()
{
clrscr();
printf("\n5/2 = %f",5/2);
/*if Error found this program replace %f into %d"*/
getch();
}

Output :(Press ALT+F9 to compile In Turboc & Press ALT+F5 to see below Message)

printf : floating point formats not linked
Abnormal program termination

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Example : 6 Variables.....

#include<stdio.h>
#include<conio.h>
void main()
{
int a;
clrscr();
printf("\n%d",10);
printf("\n%d (Garbage Value)",a);
getch();
}

Output :

10
-28711  (Garbage Value)

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Example : 7 Variables.....

#include<stdio.h>
#include<conio.h>
void main()
{
int a;
clrscr();
a=10;
printf("\n%d ",a);
printf("\nValue = %d",a);
printf("\nGiven Value = %d",a);
getch();
}

Output :

10
Value = 10
Given Value=10

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Example : 8 Integer Variable with scanf

#include<stdio.h>
#include<conio.h>
void main()
{
int a;
clrscr();
/* a=10;*/
scanf("%d",a);
printf("\n%d ",a);
printf("\nValue = %d",a);
getch();
}

Output :if You Type 20 from Keyboard

20

Press Enter...

20
Value = 20

Finally...You can see Output window..

20
20
Value = 20

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Example : 9 Integer Variable with scanf

#include<stdio.h>
#include<conio.h>
void main()
{
int a;
clrscr();
printf("\nEnter Any Value = ");
scanf("%d",a);
printf("\nEntered Value = %d",a);
getch();
}

Output :

Enter Any Value =

if You Type 20 from Keyboard

Enter Any Value = 20

Press Enter...

Entered Value = 20

Finally...You can see Output window..

Enter Any Value =20
Entered Value = 20

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Example : 10 Working With scanf Function

#include<stdio.h>
#include<conio.h>
void main()
{
int a,b;
clrscr();
scanf("%d %d",&a,&b);
printf("\n%d",a);
printf("\n%d",b);
getch();
}

 Output : 1

if You type 10 from Keyboard

10

Press Enter > again please type 20 from Keyboard

10

20

Finally...You can see Output window..

10
20
10
20

Output : 2

press 10 from Keyboard > press spacebar (Don't Press Enter) > Press 20 from Spacebar

10 20

Press Enter >

10 20

Finally...You can see Output window..

10 20
10
20

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Example : 11 Working With Scanf ..

#include<stdio.h>
#include<conio.h>
void main()
{
int a,b;
clrscr();
printf("\nEnter  a Value = ");
scanf("%d",&a);
printf("\nEnter  b Value = ");
scanf("%d",&b);
printf("\nA Value = %d",a);
printf("\nB Value = %d",b);
printf("\nA+B Value = %d",a+b);
printf("\nA+10 Value = %d",a+10);
getch();
}

Output :

Enter a Value =

if You Type 20 from Keyboard

Enter a Value = 10

Press Enter...

Enter a Value = 10

Enter b Value = 10

Press Enter...

Finally...You can see Output window..

Enter a Value = 10
Enter b Value = 20
A Value =10
B Value= 20
A+B Value = 30
A+10 Value = 20

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Example : 12 Character Variable Declaration

#include<stdio.h>
#include<conio.h>
void main()
{
char ans;
clrscr();
printf("\n ans = %c",ans);
ans=' ';
printf("\n ans= %c",ans);
printf("\n ans= %d",ans); /*Returns ascii value of Space */
ans='Y';
printf("\n ans = %c",ans);
getch();
}

Output :

ans = Å
ans=
ans= 32
ans = Y

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Example : 13 String Variable With Scanf Function

#include<stdio.h>
#include<conio.h>
void main()
{
char ans;
char myname[15];
clrscr();
printf("\nEnter Any Character => ");
scanf("%c",&ans);
printf("\nEnter Any Name(String) => ");
scanf("%s",&myname);
printf("\nGiven Character => %c",ans);
printf("\nGiven Name => %s",myname);
getch();
}

Output :

Enter Any Character => M

Enter Any Name(String) => Manoj Kumar

Given Character => M
Given Name => Manoj

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Example : 14 String Variable With gets Function

#include<stdio.h>
#include<conio.h>
void main()
{
char ans;
char myname[15];
clrscr();

printf("\nEnter Any Name => ");
scanf("%s",&myname);
printf("\nGiven Name Using Scanf => %s",myname);

/*
Please add fflush(stdin) before gets function
If Omitted this line,You will get wrong output
If any doubt,remove the fflush(stdid); and run again
*/

printf("\nEnter Any Name => ");
fflush(stdin);
gets(myname);

printf("\nGiven Name Using gets => %s",myname);
getch();
}

Output :

Enter Any Name => Vijay Antony

Given Name Using Scanf => Vijay
Enter Any Name => Vijaya Raj

Given Name Using gets => Vijaya Raj

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Example : 15 Combine all variables (Emp Info)

#include<stdio.h>
#include<conio.h>
void main()
{

int empno;
char empname[20];
float salary;
clrscr();
printf("\nGive the Employee Details");

printf("\nEmployee ID = ");
scanf("%d",&empno);

printf("\nEmployee Name =");
fflush(stdin);
gets(empname);

printf("\nSalary = ");
scanf("%f",&salary);

printf("\nGiven Emp Details ");
printf("\nEmp ID=%d , Empname= %s,Salary = %.2f",empno,empname,salary);

getch();
}

Output :

Give the Employee Details
Employee ID = 101

Employee Name =Rakesh Sharma

Salary = 24000

Given Emp Details
Emp ID=101 , Empname= Rakesh Sharma,Salary = 24000.00

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Example : 16 print employee information with gotoxy function (Read Carefully)

/*Author : C.Saravana Kumar */
#include<stdio.h>
#include<conio.h>
void main()
{

int empno;
char empname[20];
float salary;
clrscr();

/*Syntax of gotoxy function is > gotoxy(Xposition,Yposition) */
/*
-------------------------------------- (x) |
|            .(10,1)
|
|
|             .(10,40)          .(60,40)
(y)

(10,1) Means > gotoxy(10,1);
*/
gotoxy(2,2);printf("Employee ID ");
gotoxy(25,2);scanf("%d",&empno);

gotoxy(2,4);printf("Employee Name ");
gotoxy(25,4);fflush(stdin);gets(empname);

gotoxy(2,6);printf("Salary ");
gotoxy(25,6);scanf("%f",&salary);

gotoxy(2,8);printf("\nGiven Emp Details ");
gotoxy(2,11);printf("Emp No");
gotoxy(9,11);printf("Emp Name");
gotoxy(32,11);printf("Salary");

gotoxy(2,13);printf("%d",empno);
gotoxy(9,13);printf("%s",empname);
gotoxy(32,13);printf("%.2f",salary);

getch();
}

Output :

Employee ID                101

Employee Name           Tamil Selvan

Salary                         45000

Given Emp Details

Emp No   Emp Name                             Salary

101        Tamil Selvan                           45000.00

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