C

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C Programming File

PROGRAMMING AND PROBLEM SOLVING THROUGH C LANGUAGE

SHERIL SHARMA

P1. Program to print a sentence in output screen…………………………………………………………………………………………………………………… 2P2. Program to enter two numbers and check which one is greater……………………………………………………………………………………….. 2P3. Program to add two integers…………………………………………………………………………………………………………………………………………….. 3P4. Program for showing one integer value, float value and character constant on output screen…………………………………………. 3P5. Program to input a number and check whether it is even or odd………………………………………………………………………………………. 4P6. Program to print the following pattern………………………………………………………………………………………………………………………………. 4** ** * ** * * ** * * * *P7. Program to print name 5 times using while loop………………………………………………………………………………………………………………… 5P8. Program to print sum of first 10 integers using while loop…………………………………………………………………………………………………. 5P9. Program to find out the roots of quadratic equation………………………………………………………………………………………………………….. 6P10. Program to print the following pattern…………………………………………………………………………………………………………………………….. 712 34 5 67 8 9 1011 12 13 14 15P11. Program to print the following pattern…………………………………………………………………………………………………………………………….. 700 10 1 20 1 2 30 1 2 3 4P12. Program to print the Fibonacci series to n number of places……………………………………………………………………………………………. 8P13. Program to display marks of 5 students……………………………………………………………………………………………………………………………. 9P14. Program to find average and sum of marks obtained by a class of 5 students…………………………………………………………………. 10P15. Program to print a string…………………………………………………………………………………………………………………………………………………. 11P16. Program to print the length of the string…………………………………………………………………………………………………………………………. 11P17. Program to print the reverse of the string……………………………………………………………………………………………………………………….. 12P18. Program to write input marks of 5 subjects and calculate the percentage………………………………………………………………………. 13P19. Program to input the time and print the day time…………………………………………………………………………………………………………… 14P20. Program to print factorial of a number……………………………………………………………………………………………………………………………. 14P21. Write a program to accept three sides of a triangle and transfer them to a function to compute the area of a triangle….. 15P22. Write a program to find average male and female height in the class……………………………………………………………………………… 16P23. Write a program to accept a character and determine whether it is an alphabet, character or special symbol……………….. 17P24. Program to print out powers of 2: 1, 2, 4, 8..up to 2^N……………………………………………………………………………………………………. 18P25. Program to swap two numbers without a third variable………………………………………………………………………………………………….. 19P26. Calculate Electricity Bill with if-else condition………………………………………………………………………………………………………………….. 20P27. Program to print the alphabet set a to z and A to Z in decimal form and character form…………………………………………………. 21P28. Program to print area of circle…………………………………………………………………………………………………………………………………………. 22P29. Program to print the address of a variable along with its value……………………………………………………………………………………….. 22P30. Program to read a series of words from a terminal using scanf function ……………………………………………………………………….. 23

Index

2

P1. Program to print a sentence in output screen.

#include <stdio.h>

#include<conio.h>

void main()

{

clrscr();

printf("My name is Sheril");

getch();

}

Output:My name is Sheril

P2. Program to enter two numbers and check which one is greater.

#include<stdio.h>

#include<conio.h>

void main()

{

clrscr();

int a,b;

printf("Enter two numbers: ");

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

if(a>b)

{

printf("a is greater than b");

printf("\na is less than b");

}

getch();

}

Output:Enter two numbers : 3 5

3

a is less than b

4

P3. Program to add two integers.

#include<stdio.h>

#include<conio.h>

void main()

{

clrscr();

int a,b,c;

printf("Enter an integer: ");

scanf("%d",&a);

printf("\nEnter another integer: ");

scanf("%d",&b);

c=a+b;

printf("The sum of the two integers is: ");

printf("c=%d",c);

getch();

}

Output:Enter an integer: 3

Enter another integer: 5

The sum of the two integers is: 8

P4. Program for showing one integer value, float value and character constant on output screen.

#include<stdio.h>

#include<conio.h>

void main()

{

clrscr();

int a=5;

float b=8.5;

char c='A';

printf("Interger Value = %d",a);

printf("Float Value = %f",b);

printf("Character Constant = %c",c);

getch();

}

Output:Interger Value = 5

Float Value = 8.5

5

Character Constant = A

6

P5. Program to input a number and check whether it is even or odd.

#include<stdio.h>

#include<conio.h>

void main()

{

clrscr();

int n;

printf("\nEnter a number: ");

scanf("%d",&n);

if(n%2==0)

{

printf("Number is even");

}

else

printf("Number is odd");

getch();

}

Output:Enter a number: 2 (or 3)

Number is even (or Number is odd)

P6. Program to print the following pattern** ** * ** * * ** * * * *

#include<stdio.h>

#include<conio.h>

Void main()

{

int i,j;

for(i=1;i<=5;i++)

{

for(j=1;j<=i;j++)

printf("* ");

printf("\n");

}

getch();

7

}

8

P7. Program to print name 5 times using while loop.

#include<stdio.h>

#include<conio.h>

void main()

{

clrscr();

int i=1;

while(i<=5)

{

printf("My name is Sheril\n");

i++;

}

getch();

}

Output:My name is Sheril

My name is Sheril

My name is Sheril

My name is Sheril

My name is Sheril

P8. Program to print sum of first 10 integers using while loop.

#include<stdio.h>

#include<conio.h>

void main()

{

int a=0, sum=0;

while(a<10)

{

a++;

sum+=a;

} printf("The sum is %d,sum);

getch();

}

Output:The sum is 55

9

P9. Program to find out the roots of quadratic equation.

#include<stdio.h>

#include<conio.h>

#include<math.h>

Void main()

{

int a,b,c;

float dis,root1,root2;

printf("\nEnter values of a, b and c: ");

scanf("%d%d%d",&a,&b,&c);

dis=(b*b)-4*a*c;

printf("\ndis=%f",dis);

root1=-b+sqrt(dis)/2.0*a;

root2=-b-sqrt(dis)/2.0*a;

if(dis<0)

{

printf("\nThe roots are imaginary");

}

else if(dis==0)

{

printf("\nThe roots are equal and real");

}

else

{

printf("\nThe roots are real and distinct");

printf("\nThe roots are %f%f",root1,root2);

}

getch();

}

Output:Enter values of a, b and c: 4 2 1

The roots are imaginary

10

11

P10. Program to print the following pattern12 34 5 67 8 9 1011 12 13 14 15

#include<stdio.h>

#include<conio.h>

Void main()

{

int i,j,var=1;

for(i=1;i<=5;i++)

{

for(j=1;j<=i;j++)

{

printf("%d ",var);

var+=1;

}

printf("\n");

}

getch();

}

P11. Program to print the following pattern00 10 1 20 1 2 30 1 2 3 4

#include<stdio.h>

#include<conio.h>

Void main()

{

int i,j;

for(i=0;i<=5;i++)

{

for(j=0;j<=i;j++)

{

printf("%d",j);

}

printf("\n");

}

getch();

12

}

13

P12. Program to print the Fibonacci series to n number of places

#include<stdio.h>

#include<conio.h>

Void main()

{

int a=-1,b=1,c=0,n;

printf("Enter the number of places: ");

scanf("%d",&n);

for(int i=0;i<=n;i++)

{

c=a+b;

printf("%d ",c);

a=b;

b=c;

}

getch();

}

Output:Enter the number of places: 10

0 1 1 2 3 5 8 13 21 34 55

14

P13. Program to display marks of 5 students.

#include<stdio.h>

#include<conio.h>

main()

{

int marks[5];

int i=1;

for(i=1;i<=5;i++)

{

printf("\nEnter marks of student %d: ",i);

scanf("%d",&marks[i]);

}

printf("\nThe marks of 5 students are: ");

for(i=1;i<=5;i++)

{

printf("%d ",marks[i]);

}

getch();

}

Output:Enter marks of student 1: 12

Enter marks of student 2: 13




The marks of 5 students are: 12 13 14 10 15

15

P14. Program to find average and sum of marks obtained by a class of 5 students.

#include<stdio.h>

#include<conio.h>

Void main()

{

int avg,sum=0;

int i,marks[5];

for(i=0;i<=4;i++)

{

printf("\nEnter the marks: ");

scanf("%d",&marks[i]);

}

for(i=0;i<=4;i++)

sum=sum+marks[i];

avg=sum/5;

printf("\nAverage marks are: %d\n",avg);

getch();

}

Output:

Enter the marks: 10

Enter the marks: 12

Enter the marks: 14

Enter the marks: 15

Enter the marks: 12

Average marks are: 12

16

P15. Program to print a string.

#include<stdio.h>

#include<conio.h>

#include<string.h>

void main()

{

int c;

char name[20];

printf("Enter the name");

gets(name);

printf("The name entered is");

printf("%s",name);

getch();

}

Output:Enter the name John Smith

The name entered is John Smith

P16. Program to print the length of the string.

#include<stdio.h>

#include<conio.h>

#include<string.h>

void main()

{

int c;

char name[20];

printf("Enter the name: ");

gets(name);

printf("The name entered is: ");

printf("%s",name);

c=strlen(name);

printf("\nThe length of the string is: %d",c);

getch();

}

Output:Enter the name: Sheril

The name entered is: Sheril

The length of the string is: 6

17

P17. Program to print the reverse of the string.

#include <stdio.h>

#include <string.h>

#include <conio.h>

void main()

{

char str[100], rstr[100];

int i,k;

printf("Enter the string to reverse=>");

gets(str);

for (i=strlen(str)-1,k=0; i>=0; i--,k++)

{

rstr[k]=str[i];

}

rstr[k]='\0';

printf("string <%s> reverse <%s>\n",str,rstr);

getch();

}

Output:Enter the string to reverse=> This is a sample string

string < This is a sample string> reverse <gnirts elpmas a si sihT >

18

P18. Program to write input marks of 5 subjects and calculate the percentage.

#include<stdio.h>

#include<conio.h>

void main()

{

int a,b,c,d,e;

float p;

printf("\nEnter the marks of 5 subjects: ");

scanf("%d%d%d%d%d",&a,&b,&c,&d,&e);

p=(a+b+c+d+e)/5;

printf("\nThe percentage is: ");

printf("%f\n\n",p);

if(p>=60)

printf("Ist division");

else if(p<=59&&p>=50)

printf("Second division");

else if(p<=49&&p>=40)

printf("Third division");

else

printf("Fail");

getch();

}

Output:Enter the marks of 5 subjects: 85 75 65 89 96

The percentage is: 82.000000

Ist division

19

P19. Program to input the time and print the day time

#include<stdio.h>#include<conio.h>void main(){ clrscr(); int t; printf("Enter the time in 24 hours clock format\n"); scanf("%d",&t); if(t==0) printf("It is midnight\n"); else if(t>0 && t<400) printf("The time is after midnight and not yet morning\n"); else if(t>=400 && t<700) printf("It is early morning"); else if(t>=700 && t<1200) printf("It is morning"); else if(t==1200) printf("It is exact afternoon"); else if(t>1200 && t<300) printf("It is afternoon"); else if(t>=300 && t<=700) printf("It is evening"); else printf("It is Night");getch();}

Output:Enter the time in 24 hours clock format

400

It is early morning

P20. Program to print factorial of a number.

#include<stdio.h>

#include<conio.h>

void main()

{

int fact=1,i=1,n;

printf("Enter the number:\n");

scanf("%d",&n);

while(n!=i)

{

fact=fact*n;

n--;

}

20

printf("The factorial is: %d",fact);

getch();

}

Output:Enter the number:

5

The factorial is: 120

P21. Write a program to accept three sides of a triangle and transfer them to a function to compute the area of a triangle

#include <stdio.h> /*header file*/

#include <conio.h> /*header file*/

#include <math.h>

int main() /*main function*/

{

float tri_area(float a,float b, float c); /* new function*/

float s1;

float s2;

float s3;

float area;

printf("\nEnter the three sides of a triangle");

scanf("%f%f%f",&s1,&s2,&s3);

area=tri_area(s1,s2,s3);

printf("\n Area of triangle is : %f square units.", area); /*printing area*/

_getch();

}

float tri_area(float a,float b,float c)

{

float s;

float area;

s=(a+b+c)/2;

area=sqrt(s*(s-a)*(s-b)*(s-c)); /*heron’s formula*/

return(area);

}

Output:Enter the three sides of a triangle 12 14 16

21

Area of triangle is : 81.332649 square units.

22

P22. Write a program to find average male and female height in the class

#include<stdio.h> /*header file*/

#include<conio.h>


{

float mavg=0, favg=0;

int mh[5], fh[5], count;

float mtot; float ftot;

mtot=0,ftot=0;

for(count=0;count<5;count++) /*for loop*/

{

printf("\nEnter the height of %d",count+1);

printf(" male: ");

scanf("%d",&mh[count]);

mtot+=mh[count];

}

mavg=mtot/5;

printf("\n");

for(count=0;count<5;count++) /*for loop*/

{

printf("\n\nEnter the height of %d",count+1);

printf(" female: ");

scanf("%d",&fh[count]);

ftot+=fh[count];

}

favg+=ftot/5; /*Formula to find average*/

printf("\nThe average male height is %f",mavg);

printf("\nThe average female height is %f",favg);

getch();

}

Output:Enter the height of 1 male: 5

Enter the height of 2 male: 6




Enter the height of 1 female: 5





The average male height is 5.600000

The average female height is 5.400000

23

P23. Write a program to accept a character and determine whether it is an alphabet, character or special symbol

#include<stdio.h> /*header file*/

#include<conio.h>


{

char ch; /*variable declaration*/

printf("\n Enter a character : ");

scanf("%c",& ch);

if(ch>=65 && ch<=90)

{

printf("\nThe character is an upper case letter");

}

if(ch>=97 && ch<=122)

{

printf("\nThe character is an lower case letter");

}

if(ch>=48 && ch<=57)

{

printf("\nThe character is a digit");

}

if((ch>=0 && ch<48)||(ch>=57 && ch<65)||(ch>90 && ch<97)||(ch>122))

{

printf("\nThe character is a special symbol");

}

getch();

}

Output: Enter a character : a

The character is an lower case letter

24

P24. Program to print out powers of 2: 1, 2, 4, 8..up to 2^N

#include <stdio.h>

#include<conio.h>

#define N 16

main()

{

int n; /* The current exponent */

int val = 1; /* The current power of 2 */

printf("\t n \t 2^n\n");

printf("\t================\n");

for (n=0; n<=N; n++)

{

printf("\t%3d \t %6d\n", n, val);

val = 2*val;

getch();

}

}

Output: n 2^n

================

0 1

1 2

2 4

3 8

4 16

5 32

6 64

7 128

8 256

9 512

10 1024

11 2048

12 4096

13 8192

14 16384

15 32768

16 65536

25

P25. Program to swap two numbers without a third variable

#include<stdio.h>

#include<conio.h>

int swap(int *a,int *b)

{

*a=*a-*b;

*b=*a+*b;

*a=*b-*a;

}

main()

{

int a,b;

printf("\n enter First Number :");

scanf("%d",&a);

printf("\n enter Second Number :");

scanf("%d",&b);

swap(&a,&b);

printf("\n first Number is : %d",a);

printf("\n second Number is : %d",b);

getch();

}

Output:enter First Number : 3

enter Second Number : 4

first Number is : 4

second Number is : 3

26

P26. Calculate Electricity Bill with if-else condition<=100 Rs.4/units> 100 and <=300 Rs.4.50/units>300 and <=500 Rs.4.75/units>500 Rs.5/units

#include<stdio.h>

#include<conio.h>

main ()

{

int unit, total;

printf("Enter Total Units: ");

scanf ("%d", &unit);

if (unit<=100)

{

total=unit*4;

}

else if (unit>100 && unit<=300)

{

total=unit*4.5;

}

else if (unit >300 && unit<=500)

{

total=unit*4.75;

}

else

{

total=unit*5;

}

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

getch ();

}

Output:Enter Total Units: 350

27

Total: 1662

28

P27. Program to print the alphabet set a to z and A to Z in decimal form and character form

#include<stdio.h>

#include<conio.h>

main()

{

char c;

printf("\n\n");

for(c=65;c<=122;c+=1)

{

if(c>90&&c<97)

continue;

printf("|%4d - %c ", c,c);

}

printf("|\n");

getch();

}

Output: | 65 - A | 66 - B | 67 - C | 68 - D | 69 - E | 70 - F | 71 - G | 72 - H

| 73 - I | 74 - J | 75 - K | 76 - L | 77 - M | 78 - N | 79 - O | 80 - P

| 81 - Q | 82 - R | 83 - S | 84 - T | 85 - U | 86 - V | 87 - W | 88 - X

| 89 - Y | 90 - Z | 97 - a | 98 - b | 99 - c | 100 - d | 101 - e | 102 - f

| 103 - g | 104 - h | 105 - i | 106 - j | 107 - k | 108 - l | 109 - m | 110 - n

| 111 - o | 112 - p | 113 - q | 114 - r | 115 - s | 116 - t | 117 - u | 118 - v

| 119 - w | 120 - x | 121 - y | 122 - z |

29

P28. Program to print area of circle

#include<stdio.h>

#include<conio.h>

Void main()

{

float a,b;

printf("To Print Area Of Circle in Centimetres");

printf("\n\nEnter Radius of Circle = ");

scanf("%f", & a);

b= (3.14)*(a)*(a);

printf("\n\nArea of Circle is %f ", b);

getch();

}

Output:To Print Area Of Circle in Centimetres

Enter Radius of Circle = 3

Area of Circle is 28.260000

P29. Program to print the address of a variable along with its value

#include<stdio.h>

#include<conio.h>

void main()

{

char a;

int x;

float p, q;

a='A';

x=125;

p=10.25, q=18.76;

printf("%c is stored at addr %u.\n",a,&a);

printf("%d is stored at addr %u.\n",x,&x);

printf("%f is stored at addr %u.\n",p,&p);

printf("%f is stored at addr %u.\n",q,&q);

getch();

}

Output: A is stored at addr 2293575.

125 is stored at addr 2293568.

10.250000 is stored at addr 2293564.30

18.760000 is stored at addr 2293560.

31

P30. Program to read a series of words from a terminal using scanf function

#include<stdio.h>

#include<conio.h>

main()

{

char word1[40], word2[40], word3[40], word4[40];

printf("Enter text: ");

scanf("%s %s", word1, word2);

scanf("%s", word3);

scanf("%s", word4);

printf("\n");

printf("word 1 = %s\nword2 = %s\n", word1, word2);

printf("word 3 = %s\nword4 = %s\n", word3, word4);

getch();

}

Output: Enter text: this is a sample-text

word 1 = this

word2 = is

word 3 = a

word4 = sample-text

32

C

Education

integer value

aprintffloat value

aprintfinterger value

clrscr output

output screen 2p2

includevoid main

following pattern

float b