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Employee Details

Source Code:

#include

main()

{

int empno;

char empname[25], dept[25];

FILE *ptr;

ptr=fopen("emp1.txt","w");

printf("enter name,no,dept");

scanf("%s%d%s",empname,&empno,dept);

fclose(ptr);

ptr=fopen("emp1.txt","r");

fscanf(ptr,"%s%d%s",empname,&empno,dept);

printf("emp name : %s\n",empname);

printf("emp no : %d\n",empno);

printf("dept: %s\n",dept);

}

Output:

"employeee.c" 17L, 349C written

[it priya@localhost it priya]$ cc employeee.c

[it priya @localhost it priya]$ ./a.out

enter name,no,dept

dss

301

Marketing

emp name : dss

emp no : 301

dept: Marketing

[it priya @localhost it priya]$

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Swap two number using Pointers

Source Code:

#include

void swap(int *,int *);main()

{

int a=10, b=20;

printf("before swapping : \n a=%d \n b=%d \n",a,b);

swap(&a,&b);

}

void swap(int *x,int *y)

{

int z;

z=*x;

*x=*y;

*y=z;

printf("after swapping : \n a=%d \n b=%d\n", *x,*y);

}

Output:

"two.c" 17L, 243C written

[it priya @localhost it priya]$ cc two.c

[it priya @localhost it priya]$ ./a.outbefore swapping :

a=10

b=20

after swapping :

a=20

b=10

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Student Details Using pointers

Source Code:

#include

main()

{

int regno,m1,m2,m3,total;

float avg;

char name[25];

int *p1,*p2,*p3;

p1=&m1;

p2=&m2;

p3=&m3;

printf("\n Enter student name");

scanf("%s",name);

puts("Enter regno");

scanf("%d",&regno);

printf("Enter the marks for 3 subjects");

scanf("%d\n%d\n%d",&m1,&m2,&m3);

total=*p1+*p2+*p3;

avg=total/3;

printf("\n Student details \n");

printf("Name :%s\n",name:);

printf("Reg no:%d\n",regno:);

printf("Subject mark 1:%d\n",*p1);

printf("Subject mark 2:%d\n",*p2);

printf("Subject mark 3:%d\n",*p3);

printf("Total:%d\n",total);

printf("Average:%f\n",avg);

}

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Output:

[it priya @localhost it priya]$ cc js4.c

[it priya @localhost it priya]$ ./a.out

Enter student name:dishanth

Enter regno:

54646

Enter the marks for 3 subjects23

23

23

Student details

Name :arun

Reg no:54646

Subject mark 1:23

Subject mark 2:23

Subject mark 3:23

Total:69

Average:23.000000

8/2/2019 Output Unix Program-C

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Menu Driven Arithmetic Operations using Functions

Source Code:

#include

main()

{

int ch,a,b,c;

printf("\n Perform Arithemetic operations");

printf("\n Enter the values of a and b \n");

scanf("%d\n%d",&a,&b);

while(1)

{

printf("\n 1.Addition \n2. Subtraction \n3.Multiplication \n4. Division\n");

printf("\n Enter your choice");

scanf("\n%d",&ch);

switch(ch)

{

case 1:

add(a,b);

break;

case 2:

sub(a,b);

break;

case 3:

mul(a,b);

break;

case 4:

div(a,b);

break;

default:

printf("\n Wrong value");

exit(0);

}}

}

int add(int p, int q)

{

int r;

r=p+q;

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printf("\n Answer is %d\n",r);

}

int sub(int p, int q)

{

int r;

r=p-q;

printf("\n Answer is %d\n",r);

}

int mul(int p, int q)

{

int r;

r=p*q;

printf("\n Answer is %d\n",r);

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Output:

[it priya @localhost it priya]$ cc functions.c

[it priya @localhost it priya]$ ./a.out

Perform Arithemetic operations

Enter the values of a and b

5 6

1.Addition

2. Subtraction

3.Multiplication

4. Division

Enter your choice1

Answer is 11

1.Addition

2. Subtraction

3.Multiplication

4. Division

Enter your choice2

Answer is -1

1.Addition

2. Subtraction

3.Multiplication

4. Division

Enter your choice3

Answer is 30

1.Addition

2. Subtraction

3.Multiplication

4. Division

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Tower of Hanoi

Source Code:

#include

int main()

{

void hanoi(int, char, char, char);

int n;

printf("\n Enter number of disks:\n");

scanf("%d",&n);

hanoi(n,'L','R','C');

return 0;

}

void hanoi(int n, char from, char to, char temp)

{

if(n>0)

{

hanoi(n-1,from,temp,to);

printf("Move disk %d from %c %c\n",n,from,to);

hanoi(n-1,temp,to,from);

}

}

Output:

"hanoi.c" 20L, 325C written

[it priya @localhost it priya]$ cc hanoi.c

[it priya @localhost it priya]$ ./a.out

Enter number of disks:

3

Move disk 1 from L R

Move disk 2 from L C

Move disk 1 from R C

Move disk 3 from L RMove disk 1 from C L

Move disk 2 from C R

Move disk 1 from L R

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Memory Allocation

Source Code:

#include

int main()

{

char *p;

p=(char*)malloc(6);

strcpy(p,"MADRAS");

printf("Memory contains %s\n",p);

p=(char*)realloc(p,7);

strcpy(p,"CHENNAI");

printf("\nMemory now contains %s\n",p);

free(p);

return 0;

}

Output:

"js1.c" 14L, 220C written

[it priya @localhost it priya]$ cc js1.c

[it priya @localhost it priya]$ ./a.out

Memory controls MADRAS

Memory now contains CHENNAI

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Electricity Bill

Source Code:

#include

int main()

{

int unit,bill;

float amt;

char name[50];

printf("Enter name");

scanf("%s",name);

printf("Enter the bill no");

scanf("%d",&bill);

printf("Enter the total no of units");

scanf("%d",&unit);

if(unit>300)

{

amt=unit*4;

}

else

{

amt=unit*4.50;

}

printf("\n Name: %s",name);

printf("\n Bill no :%d",bill);

printf("\n Units used :%d",unit);

printf("\n Net amt: %f",amt);

Output:

[it priya @localhost it priya]$ cc js3.c

[it priya @localhost it priya]$ ./a.out

Enter name:ramu

Enter the bill no:5656Enter the total no of units:45

Name: ramu

Bill no: 5656

Units used :45

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Read And Write The Content Of Files

Source Code:

#include

int main()

{char c;

FILE*fp;

printf("\nEnter the contents of file.....");

fp=fopen("data.txt","w");

while((c=getc(stdin))!='0')

fputc(c,fp);

fclose(fp);

fp=fopen("data.txt","r");

printf("\n File contents are \n");

do

{

c=fgetc(fp);

putchar(c);

}while(c!=EOF);

fclose(fp);

return 0;

}

"read.c" 20L, 303C written

Output:

[it priya @localhost it priya]$ cc read.c

[it priya @localhost it priya]$ ./a.out

Enter the contents of file.....

hi friend

we are it guys

in DACE

0

File contents are

hi friendwe are it guys

in DACE

[it priya @localhost it priya]$

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Matrix MultiplicationSource Code:

#include

main()

{

int a[10][10],b[10][10],c[10][10],i,j,k;

int r1,r2,c1,c2;

printf("Enter the size of matrix A");

scanf("%d%d",&r1,&c1);

printf("\nEnter the size of matrix B:");

scanf("%d%d",&r2,&c2);

if(c1 != r2)

printf("\n Matrix multiplication is not possible");

else

{

printf("\nEnter the elements of Matrix A");

for(i=0;i

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}

printf("\nResultant matrix ");

"mult.c" 53L, 716C written

Output:

[it priya @localhost it priya]$ cc mult.c

[it priya @localhost it priya]$ ./a.out

Enter the size of matrix A 3 3

Enter the size of matrix B:3 3

Enter the elements of Matrix A

2 3 4

5 5 6

4 5 1

Enter the elements of matrix B

2 3 4

5 6 7

1 8 9

Resultant matrix

23 23 23

93 93 93

60 60 60

[it priya @localhost it priya]$

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Factorial Of A Given Number Using Recursion

Source Code:

#include

main()

{

int f,n;

printf("\n Enter the value for finding the factorial\n");

scanf("%d",&n);

f=fact(n);

printf("\n Factorial of %d is %d\n",n,f);

}

int fact (int a)

{

int n;

if(a==1 || a==0)

return 1;

else

n=a*fact(a-1);

return n;

}

Output:

[it priya @localhost it priya]$ cc fact.c

[it priya @localhost it priya]$ ./a.out

Enter the value for finding the factorial

5

Factorial of 5 is 120

[it priya @localhost it priya]$

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Dynamic Memory Allocation

Source Code:

#include

#include

main()

{

char *a;

int i;

a=(char *)calloc(5,1);

printf("\n Storage address of memory \n");

printf("\n Block Address: %u \n",a);

printf("\n Enter the string having 5 characters\n");

for(i=1;i

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SHELL

PROGRAM

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C

PROGRAM

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11.REVERSE OF A NUMBER

echo "enter the number:"

read n

u=0

while test $n -ne 0

do

u=`expr $n % 10`

n=`expr $n / 10`

echo $u

done

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7.SQUARE OF SET OF NUMBERS

echo "enter the starting number"

read c

echo "enter the limit number"

read b

s=0

while test $c -le $b

do

s=`expr $c \* $c`

echo "$c * $c=$s"

c=`expr $c + 1`

done

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3.AREA & CIRCUMFERENCE OF CIRCLE

echo "enter the radius of the circle"

read r

area=`expr 3 \* $r \* $r`

circumference=`expr 2 \* 3 \* $r`

echo "area= $area"

echo "circumference= $circumference"

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2.BIGGEST OF THREE NUMBERS

echo "enter the three numbers"

read a

read b

read c

if test $a-gt $b -a $a -gt $c

then

echo " A is greater"

elif test $b -gt $c -a $b -gt $c

then

echo " B is greater"

else

echo "c is greater"

fi

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4.EVEN OR ODD

echo "enter the number"

read n

if test `expr $n % 2` -eq 0

then

echo "$n is even"

else

echo "$n is odd"

fi

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5.LEAP YEAR OR NOT

echo "enter the number"

read n

if test `expr $n % 4` -eq 0

then

echo " leap year"

else

echo "not a leap year"

fi

REVERSE OF NUMBERS

echo "enter the number"

read n

u=0

while test $n -ne 0

do

u=`expr $n % 10`

n=`expr $n / 10`

echo "$u"

done

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1.AREA OF TRIANGLE

echo "enter the base and height"

read b

read h

c=`expr $b \* $h`

area=`expr $c / 2`

echo "area of the triangle is $area"

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6.USAGE OF DATE & TIME

u=`date +%H`

i=`date +%T`

echo "$i"

if test $u -lt 12

then

echo "good morning"

elif test $u -gt 12 -a $u -lt 16

then

echo "good afternoon"

elif test $u -gt 16 -a $u -lt 18

then

echo "good evening"

else

echo "good night"

fi

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8.SWAPPING OF TWO NUMBERS

echo "enter two number"

read a

read b

echo "the value of $a and $b"

i=0

i=$a

a=$b

b=$i

echo "the swapped values of $a and $b"

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9.GENERATION OF NUMBERS USING WHILE LOOP

echo "enter the limit"

read n

i=0

while test $i -lt $n

do

i=`expr $i + 1`

echo "$i"

done

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10.FIBONACCI SERIES

echo "enter the number"

read n

echo "the result is"

c=0

a=0

b=1

echo "$a"

echo "$b"

n=`expr $n - 2`

while test $n -ne 0

do

c=`expr $a + $b`

echo "$c"

a=$b

b=$c

n=`expr $n - 1`

done

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14.SUM OF SERIES

i=1

for i in 1 2 3 4 5

do

s=`expr $s + $i`

done

echo " THE SUM OF series IS $s"

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15.SUM OF EVEN SERIES

i=1

for i in 2 1 4 5 3

do

s=`expr $i % 2`

if test $s -eq 0

then

sum=`expr $sum + $i`

fi

done

echo "sum of the series is $sum"

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17.GENERATION OF PAY BILL

echo "employee name"

read name

echo "employee id"

read a

echo "enter the basic"

read basic

echo "enter hra"

read hra

da=`expr $basic / 10`

pf=`expr $basic / 20`

gross=`expr $basic \+ $da \+ $hra`

net=`expr $gross - $pf`

echo "employee name:$name"

echo "employee id:$a"

echo "gross pay:$gross"

echo "net pay:$net"

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18.ARITHMETIC OPERATION USING CASE

echo "enter the first number"

read a

echo "enter the second number"

read b

echo "1.addition"

echo "2.subtraction"

echo "3.multiplication"

echo "4.division"

echo "enter the option"

read option

case $option in

1)echo "addition result =`expr $a \+ $b`";;

2)echo "subtraction result =`expr $a \- $b`";;

3)echo "multiplication result =`expr $a \* $b`";;

4)echo "division result =`expr $a \/ $b`";;

5)echo "invalid choice";;

esac

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13.FACTORIAL OF A GIVEN NUMBER

echo ENTER THE NUMBER:

read a

i=1

while test $agt 1

do

i=`expr $a \* $i`

a=`expr $a -1`

done

echo THE FACTORIAL OF THE NUMBER IS $i