Key Architecture Takeaways

• ›
  Point 1: Core computer science and engineering computing concept: C Programming Lab Assessment (Diploma Engineering).
• ›
  Point 2: Detailed trace of memory representation, algorithmic complexity, and control structures.
• ›
  Point 3: Includes portable ISO C (C17/C23) code examples verified with modern GCC and Clang.

> gcc -Wall -Wextra -O2 program.c -o program
> ./program
> ```


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# **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 .

c

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
addition is = 14
subtraction is = 10
multiplication is = 24
division is = 6

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

c

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.

c

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 .

c

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.

c

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 .

c

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.

c #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.

c #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(bb-4ac); if(d==0) { printf("Both roots are Equal\n"); r1=r2=-b/(2a); printf("r1=%f r2=%f",r1,r2); } else { if(d>0) { printf(" Roots are real and Unequal \n"); r1 = (-b+d) / (2a) ; r2 = (-b-d) / (2a) ; 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.

c

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.

c #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

c #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 .

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

c #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

c #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

c #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

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

c #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.

c #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.

c

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.

c

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

c #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)

c #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.

c #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 .

c #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 )

c #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.

c #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?

c #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.

c #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

c #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 .

c #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 .

c #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

c [d]) ; printf("Sum of entered matrices:-\n"); for (c = 0 ; c < m; c++) { for (d = 0 ; d < n; d++) { sum

[d] = first

c [d] + second

[d];
printf("%d\t", sum

c [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.

c #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 .

c #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 .

c #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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