# C Programming Lab Assessment (Diploma Engineering)

## Lab Manual for Mechanical Dept.(3rd year)

Attention:
Dear Students, ME-A,ME-B1,ME-B2 (3rd Year) submit Your C Programming lab copy within 26/09/2016.

## Program #1. Write a C program to perform addition , subtraction , multiplication and division of two numbers .

``` # include <stdio.h>
# include <conio.h>
void main ( )
{
int a , b ,sum , sub , mul , div ;
clrscr ( ) ;
printf(“ Enter two numbers =”) ;
scanf ( “ %d %d “ , &a, &b);
sum = a + b;
sub= a – b ;
mul = a * b ;
div = a / b ;
printf( “addition is = %d \n“ , sum);
printf( “subtraction is = %d\n “ , sub);
printf( “multiplication is = %d \n“ , mul);
printf( “division is = %d “ , div);
getch ( );
}```

OUTPUT :
Enter two numbers = 12 2
subtraction is = 10
multiplication is = 24
division is = 6

## Program #2. To interchange the numeric values of two variables using the third variable.

``` # include <stdio.h>
# include <conio.h>
void main ( )
{
int a , b , t ;
clrscr ( ) ;
printf(“ Enter two numbers =”) ;
scanf ( “ %d %d “ , &a, &b);
t = a ;
a= b ;
b= t ;
printf( “After interchange value is a = %d b=%d “, a , b);
getch ( );
}```

OUTPUT :
Enter two numbers = 12 34
After interchange, value is a = 34
b = 12
Program #3. To interchange the numeric values of two variables without using the third variable.

``` # include <stdio.h>
# include <conio.h>
void main ( )
{
int a , b , t ;

clrscr ( ) ;
printf(“ Enter two numbers =”) ;
scanf ( “ %d %d “ , &a, &b);
a = a + b;
b = a – b ;
a = a – b ;
printf( “After interchange value is a = %d b=%d “, a , b);
getch ( );
}```

OUTPUT :
Enter two numbers = 12
34
After interchange value is
a = 34 b = 12

## Program #4. To calculate an area of a rectangle .

``` # include <stdio.h>
# include <conio.h>
void main ( )
{
int a , b , area ;
clrscr ( ) ;
printf(“ Enter length of the rectangle =”) ;
scanf ( “ %d “, &a);
printf(“ Enter width of the rectangle =”) ;
scanf ( “ %d “, &b);
area = a * b ;
printf( “Area is = %d”, area);
getch ( );
}```

OUTPUT :
Enter length of the rectangle = 15
Enter width of the rectangle =10
Area is = 150

## Program #5. Identify greater number between two numbers using C program.

``` # include <stdio.h>
# include <conio.h>
void main ( )
{
int a , b ;
clrscr ( ) ;
printf(“ Enter two numbers =”) ;
scanf ( “ %d %d “ , &a, &b);
if ( a > b)
printf ( “greater is = %d “ , a);
else
printf( “greater is = %d “ , b);
getch ( ) ;
}```

OUTPUT :
Enter two numbers= 40 60
greater is = 60

## Program #6. To check a given number is Even or Odd .

``` # include <stdio.h>
# include <conio.h>
void main ( )
{
int n ;
clrscr ( ) ;
printf(“ Enter the number =”) ;
scanf ( “ %d” ,&n);
if ( n % 2 = = 0)
printf(“even number “);
else
printf(“odd number “);
getch ( );
}```

OUTPUT :
Enter the number = 6
Even number

## Program #7. Take three sides of a triangle as input and check whether the triangle can be drawn or not. If possible, classify the triangle as equilateral, isosceles, or scalene.

``` #include<stdio.h>
#include<conio.h>
void main ( )
{
int a,b,c;
clrscr ( );
printf("Enter the value of three sides=");
scanf("%d %d %d", &a, &b, &c);
if( a + b > c || a + c > b || b + c > a)
{
printf("triangle is possible \n");
if(a==b && b==c)
{
printf("Equilateral triangle");
}
else
{
if(a= =b || b= =c || a= =c)
printf(" Isoceles triangle ");
else
printf(" Scalene triangle ");
}
}
else
printf(" Triangle is not possible ");
getch ( ) ;
}```

OUTPUT :
Enter the value of three sides = 5 8 5
the triangle is possible
Isosceles triangle

## Program #8. To find the roots of a quadratic equation.

``` #include<stdio.h>
#include<conio.h>
#include<math.h>
void main ( )
{
float a,b,c,r1,r2,d;
clrscr ( );
printf("Enter the value of a,b,c");
scanf("%f %f %f", &a, &b, &c);
d=sqrt(b*b-4*a*c);
if(d==0)
{
printf("Both roots are Equal\n");
r1=r2=-b/(2*a);
printf("r1=%f r2=%f",r1,r2);
}
else
{
if(d>0)
{
printf(" Roots are real and Unequal \n");
r1 = (-b+d) / (2*a) ;
r2 = (-b-d) / (2*a) ;
printf("r1=%f r2=%f",r1,r2);
}
else
printf("roots are imaginary");
}
getch( );
}```

OUTPUT :
Enter the value of a , b, c =
1 -3 -4
Roots are real and unequal
r1=4.000000 r2 = -1.000000
Enter the value of a , b, c =
1 0 -4
Roots are real and unequal
r1= -2.000000 r2 = 2.000000

## Program #9. Find the factorial of given number.

``` # include <stdio.h>
# include <conio .h>
void main ( )
{
int i, n, fact = 1 ;
clrscr ( ) ;
printf("Enter a number to calculate it's factorial = “) ;
scanf("%d", &n);
for (i = 1; i <= n; i++)
fact = fact * i ;
printf("Factorial of %d = %d\n", n, fact);
getch ( );
}```

OUTPUT :
Enter a number to calculate it’s factorial
= 5
Factorial of 5 is = 120

## Program #10. To find the sum of n natural numbers.

``` #include <stdio.h>
#include<conio .h >
void main ( )
{
int n, i, sum=0 ;
clrscr ( ) ;
printf("Enter an integer = ");
scanf("%d",&n);
for(i =1; i <=n ; i++)
{
sum = sum + i ;
}
printf("Sum is = %d",sum);
getch ( ) ;
}```

## Program #11. Print the sum of 1 + 3 + 5 + 7 +…………..+ n

``` #include <stdio.h>
#include<conio .h >
void main ( )
{
int n, i, sum=0 ;
clrscr ( ) ;
printf("Enter the range = ");
scanf("%d",&n);
for(i =1; i <=n ; i = i + 2)
{
sum = sum + i ;
}
printf("Sum is = %d",sum);
getch ( ) ;
}```

OUTPUT :
Enter an integer = 7
Sum is = 28
OUTPUT :
Enter the range =9
Sum is = 25

## Program #12. Print the pattern .

*
* *
* * *
* * * *
* * * * *

``` #include <stdio.h>
#include<conio .h >
void main ( )
{
int i, j, rows;
clrscr ( ) ;
printf("Enter the number of rows: ");
scanf("%d",&rows);
for(i=1; i<=rows; i++)
{
for(j=1; j<=i; j++)
{
printf (" * ");
}
printf("\n");
}
getch ( ) ;
}```

## Program #13. Print the pattern

1
1 2
1 2 3
1 2 3 4
1 2 3 4 5

``` #include <stdio.h>
#include<conio .h >
void main ( )
{
int i, j, rows;
clrscr ( ) ;
printf("Enter the number of rows: ");
scanf("%d",&rows);
for(i=1 ; i<=rows ; i++)
Copyright Protected @2016 (Computer Dept. NHIT)
{
for(j=1; j<= i ; j++)
{
printf (" %d" , j ) ;
}
printf("\n") ;
}
getch ( ) ;
}```

## Program #14. Print the pattern

A
A B
A B C
A B C D
A B C D E

``` #include <stdio.h>
#include<conio .h >
void main( )
{
int i, j;
for(i=1;i<=5;i++)
{
for(j=1 ; j<=i ; j++)
{
printf("%c" ,'A' + j-1);
}
printf("\n");
}
getch ( );
}```

## Program #15. Print the pattern

* * * * *
* * * *
* * *
* *
*

``` #include <stdio.h>
#include<conio .h >
void main ( )
{
int i, j, rows;
clrscr ( ) ;
printf("Enter the number of rows: ");
scanf("%d",&rows);

for( i= rows ; i > = 1 ; i - -)
{
for ( j=1; j<= i ; j++)
{
printf (" * “ ) ;
}
printf("\n") ;
}
getch ( ) ;
}```

## Program #16. Check whether an input number is a palindrome or not.

``` #include <stdio.h>
#include < conio. h >
void main( )
{
int n, reverse = 0, temp ,r;
clrscr ( ) ;
printf ("Enter a number to check if it is a palindrome or not=");
scanf ("%d", &n);
temp = n;
while( temp ! = 0 )
{
r = temp % 10
reverse = reverse * 10 + r ;
temp = temp/10;
}
if ( n == reverse )
printf("%d is a palindrome number.\n", n);
else
printf("%d is not a palindrome number.\n", n);
getch ( );
}```

OUTPUT :
Enter a number to check if it is a
palindrome or not= 151
151 is a palindrome number

## Program #17. To find Sum of digits of an integer.

``` # include < stdio. h>
# include < conio . h>
void main( )
{
int n, sum = 0, r ;
printf(" Enter an integer=" ) ;

scanf("%d", &n);
while (n != 0)
{
r = n % 10;
sum = sum + r ;
n = n / 10 ;
}
printf("Sum of digits =%d “ , sum);
getch ( ) ;
}```

## Program #18. Find the G.C.D and L.C.M of two numbers.

``` # include <stdio.h>
# include <conio. h>
void main ( )
{
int a, b, x, y, t, gcd, lcm ;
clrscr ( );
printf("Enter two integers=") ;
scanf("%d%d", &x, &y) ;
a = x;
b = y;
while (b != 0)
{
t = b;
b = a % b;
a = t;
}
gcd = a;
lcm = (x*y) / gcd;
printf("Greatest common divisor of %d and %d = %d\n", x, y, gcd);
printf("Least common multiple of %d and %d = %d\n", x, y, lcm);
getch ( ) ;
}```

OUTPUT :
Enter two integers = 15 18
Greatest common divisor of 15 and 18 = 3
Least common divisor of 15 and 18 = 90

## Program #19. Print the sum of 2 + 4 + 6 + 8 +………………..+n

``` #include <stdio.h>
#include<conio .h >
void main ( )
{
int n, i = 2, sum=0 ;
clrscr ( ) ;
printf("Enter the range = ");
scanf("%d",&n);
do
{
sum = sum + i ;
i = i + 2 ;
}while ( i <= n) ;
printf("Sum is = %d", sum) ;
getch ( ) ;
}```

OUTPUT :
Enter the range = 10
Sum is = 30
OUTPUT :
Enter the range = 5
Sum is = 55

## Program #20. Print the sum of ( 1*1) + (2*2) + (3*3) + (4*4) + (5*5) + … + (n*n)

``` #include <stdio.h>
#include<conio .h >
void main ( )
{
int n , i =1, sum = 0 ;
clrscr ( ) ;
printf("Enter the range = ");
scanf("%d",&n);
do
{
sum = sum + i * i ;
i + + ;
}while ( i <= n) ;
printf("Sum is = %d", sum) ;
getch ( ) ;
}```

## Program #21. To check a given number is prime or not.

``` #include<stdio.h>
#include<conio .h >
void main ( )
{
int n , c = 2;
clrscr ( );
printf("Enter a number to check if it is prime\n");
scanf("%d",&n);
for ( c = 2 ; c <= n - 1 ; c++ )
{
if ( n%c = = 0 )
{
printf("%d is not prime.\n", n);
break;
}
}
if ( c == n )
printf("%d is prime.\n", n);
getch ( ) ;
}```

## Program #22. Use of “continue “ statement .

``` #include<stdio.h>
#include<conio .h >
void main ( )
{
int j ;
clrscr ( ) ;
for ( j=0; j<=8; j++)
{
if (j==4)
{
continue ;
}
printf("%d ", j);
}
getch ( ) ;
}```

## Program #23. To test whether the given character is Vowel or not. ( using switch case )

``` #include<stdio.h>
#include<conio.h>
void main()
{
char ch;
clrscr ( );
printf("Enter a character=") ;

scanf("%c", &ch);
switch ( ch )
{
case 'a' :
case 'A' :
case 'e' :
case 'E' :
case 'i' :
case 'I' :
case 'o' :
case 'O' :
case 'U' :
case 'u' :
printf(" %c is vowel ", ch);
break;
default:
printf(" %c is not vowel ",ch);
}
getch ( );
}```

OUTPUT :
Enter a character= E
E is vowel

## Program #24 . Write a C program to print day of week name using the switch case.

``` #include<stdio.h>
#include<conio.h>
void main()
{
int week;
clrscr();
printf("Enter week number(1-7): ");
scanf("%d", &week);
switch(week)
{
case 1: printf("MONDAY");
break;
case 2: printf("TUESDAY");
break;
case 3: printf("WEDNESDAY");
break;
case 4: printf("THURSDAY");
break;
case 5: printf("FRIDAY");
break;
case 6: printf("SATURDAY");
break;
case 7: printf("SUNDAY");
break;
default: printf("Invalid input! Please enter week number between 1-7");
}

getch();
}```

OUTPUT:
Enter Week number(1-7): 7
SUNDAY

## Program #25. C program to print the number of days in a month using switch case?

``` #include<stdio.h>
#include<conio.h>
void main()
{
int month;
clrscr();
printf("Enter month number(1-12): ");
scanf("%d", &month);
switch(month)
{
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12: printf("31 days");
break;
case 4:
case 6:
case 9:
case 11: printf("30 days");
break;
case 2: printf("28/29 days");
break;
default: printf("Invalid input! Please enter month number between 1-12");
}
getch();
}```

OUTPUT:
Enter month number(1-12): 2
28/29 days

## Program #26.To accept 10 numbers and make the average of the numbers using one dimensional array.

``` #include <stdio.h>
#include<conio .h >
void main ( )
{
float a[15], sum =0 , avg , i ;
clrscr ( ) ;
printf("Enter values of 10 numbers = ");
for( i=0 ; i< 10 ; i ++)
{
scanf("%f ",& a [ i ] );

sum = sum + a[ i ] ;
}
avg = sum / 10 ;
printf("Average is = %f ",avg);
getch ( ) ;
}```

OUTPUT:
Enter values of 10 numbers = 8 2
6 3 9 7 11 21 30 22
Average is = 11 . 900000

## Program #27.To accept 10 elements and sort them in descending order using one

``` #include<stdio.h>
#include<conio.h>
void main ( )
{
int i, j,temp,a[10];
clrscr ( );
printf(“Enter 10 integer numbers: \n”);
for(i=0;i<10;i++);
scanf(“%d”,&a[i]);
for (i=0;i<10;i++)
{
for(j=i+1;j<10;j++)
{
if ( a[i] < a[j] )
{
temp=a[j];
a[ j]=a[i];
a [ i]=temp;
}
}
}
printf(“\n\nThe 10 numbers sorted in descending order are: \n”);
for(i=0;i<10;i++)
printf(“%d\t”,a[i]);
getch ( );
}```

OUTPUT :
Enter a string: programming
Length of string : 11
OUTPUT:
Enter 10 integer numbers: 5 2 10 7 6
1 4 3 8 9
The 10 numbers sorted in descending order
are:
10 9 8 7 6 5 4 3 2 1

## Program #28. Find out the length of a string .

``` #include <stdio.h>
#include<conio.h>
void main()
{
char s[90] , i;
printf("Enter a string: ");
scanf("%s",s);
for(i=0; s[i]!='\0'; i++);
printf("Length of string: %d",i);
getch ( );
}```

OUTPUT :
Enter a string: programming
Length of string : 11

## Program #29. Find out the addition of two matrices .

```#include <stdio.h>
#include<conio.h>
void main()
{
int m, n, c, d, first[10][10], second[10][10], sum[10][10];
printf("Enter the number of rows and columns of matrix\n");
scanf("%d%d", &m, &n);
printf("Enter the elements of first matrix\n");
for (c = 0; c < m; c++)
for (d = 0; d < n; d++)
scanf("%d", &first[d]);
printf("Enter the elements of second matrix\n");
for (c = 0; c < m; c++)
for (d = 0 ; d < n; d++)
scanf("%d", &second[d]) ;
printf("Sum of entered matrices:-\n");
for (c = 0 ; c < m; c++) {
for (d = 0 ; d < n; d++) {
sum[d] = first[d] + second[d];
printf("%d\t", sum[d]);
}
printf("\n");
}
getch ( ) ;
}```

OUTPUT :
Enter the number of rows and columns of matrix
3 2
Enter the elements of the first matrix
5 8
4 1
5 2
Enter the elements of the second matrix
2 6
4 7
1 2
Sum of entered matrices
7 14
8 8
6 4

## Program #30. To find the summation of three numbers using the function.

``` #include <stdio.h>
#include<conio .h >
int add ( int x , int y, int z);
void main ( )
{
int a ,b ,c, r ;
clrscr ( ) ;
printf("Enter three numbers = ");
scanf("%d %d %d “, &a, &b, &c );
r = add (a, b, c);
printf (“ summation is = %d “, r);
getch ( );
}
int add ( int x, int y , int z)
{
int s;
s = x + y + z ;
return s;
}```

OUTPUT :
Enter three numbers = 10 20 30
Summation is = 60

## Program #31. To find the maximum between two numbers using the function .

``` #include <stdio.h>
#include<conio .h >
int max ( int x , int y, );
void main ( )
{
int a ,b , r ;
clrscr ( ) ;
printf("Enter two numbers = ");
scanf("%d %d %d “, &a, &b );
r = max (a, b);
printf (“ maximum is = %d “, r);
getch ( );
}
int max ( int x, int y )
{
int s;
if (x > y)
s=x;
else
s=y;
return s ;
}```

OUTPUT :
Enter two numbers = 10 20
maximum is = 20

## Program #32. Find out the square of a number using a function .

``` #include <stdio.h>
#include<conio .h >
int square( int x );
void main ( )
{
int n , r ;
clrscr ( ) ;
printf("Enter the number = ");
scanf("%d “, &n);
r = square ( n ) ;
printf (“ Square value is = %d “, r);
getch ( );
}
int square ( int x )
{
int s ;
s = x * x ;
return s ;
}
OUTPUT :
Enter the number = 10
Square value is = 100```

OUTPUT :
Enter the number = 10
Square value is = 100

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## 2 thoughts on “C Programming Lab Assessment (Diploma Engineering)”

1. Arnab Dhibar |

sir, eigulo Pirnt kore niya aste hobe ? / hand writting ?

• Bikash Mondal |

No printout..you need to write the programme in your lab copy..

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