C Answers

write a C code to add two polynomials having n number of unknown variables

3. Using the online compiler:-

• Enter the code from the file bitwise_demo.c

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
	
	byte_t result;	
	byte_t second_byte;
	byte_t first_byte;

	int    shift;
	
	// Reading the first byte. Integer is entered then cast to byte_t.
	printf("Enter the value of the first_byte (0-255): ");
	scanf("%d", &i);
	first_byte = (byte_t)i;
	
	// Reading the second byte. Integer is entered then cast to byte_t.
	printf("Enter the value of the second_byte (0-255): ");
	scanf("%d", &i);
	second_byte = (byte_t)i;
	printf("\n\n");
	
	// The results will be printed out in hexadecimal.
	// The %X placeholder is for hexadecimal output.
	// This can be extended to %02X, i.e. a hexadecimal
	// character, 2 characters wide, with leading blanks
	// filled-in as zeros.
	
	// Bitwise inversion
	result = ~first_byte;
	printf("The value of ~(%02X) is %02X\n", first_byte, result);
	result = ~second_byte;
	printf("The value of ~(%02X) is %02X\n\n\n", second_byte, result);
	
	// Bitwise AND, OR, XOR
	result = first_byte & second_byte;
	printf("The value of (%02X) & (%02X) is %02X\n", 
		first_byte, second_byte, result);
	result = first_byte | second_byte;
	printf("The value of (%02X) | (%02X) is %02X\n", 
		first_byte, second_byte, result);
	result = first_byte ^ second_byte;
	printf("The value of (%02X) ^ (%02X) is %02X\n", 
		first_byte, second_byte, result);
		
	system("pause");
	return 0;
}

• Add this source code to your logbook.

• Run the program. You will be prompted to enter two values between 0 and 255. Initially enter 234 and 37.

• Add the output of this program to your logbook.

• Repeat this with other values of your choice.

• Write a short reflective account of the code concentrating on its functionality and comparing the outputs against the source code.

2. Using the online compiler

• Enter the code from the file bit_shift_demo.c

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
	
	byte_t first_byte = 128;
	byte_t second_byte = 1;
	int    shift;
	
	printf("Enter the number of left/right shifts: ");
	scanf("%d", &shift);
	printf("\n\n");
	
	// Right-shift first_byte
	first_byte = first_byte >> shift;
	
	// Left-shift second byte
	// This is the equivalent of second_byte = second_byte << shift; 
	second_byte <<= shift;		
	
	// Display the results
	printf("128 >> %d = %d\n", shift, first_byte);
	printf("1 << %d = %d\n", shift, second_byte);
	
	system("pause");
	return 0;
}

 Run the program. You will be prompted to enter a value for the number of shifts. Initially enter the value of zero

• Add the output of this program to your logbook.

• Repeat the previous two steps with values of 1, 2, 3, 4, 5, 6, 7, and 8.

• Write a short reflective account of the code concentrating on its functionality and comparing the outputs against the source code.

1. Using the online compiler (or Dev C++):-

• Enter the code from the file operators.c https://vle.dmu.ac.uk/bbcswebdav/pid-5463722-dt-content-rid-10886002_1/courses/ENGD1025_2122_520/operators%281%29.c

• Add this source code to your logbook.

• Run the program. You will be prompted to enter integer values for a and b. Enter 4 for a, and 5 for b.

• Add the output of this program to your logbook

• Write a short reflective account of the code concentrating on its functionality and comparing the outputs against the source code.

3. Write a C program using an online C compiler that implements the following:-

• Declare a string; upon initialization populate the string with a phrase of your choice.

• Declare a second-string; upon initialization populate that string with a different phrase of your choice.

• Display both strings using a single printf() function call.

2. Write a C program using an online C compiler (or Dev C++) that implements the following:-

• Declare a 10-element floating-point array; give the array a suitable name.

• Declare an integer variable (of type int); call it i

• Upon declaration, populate the array with 10 floating-point numbers of your choice.

• Prompt the user to enter a value between 0 and 9

• Read a number from the keyboard into i

• Display the ith element of the array

1. Write a C program using an online C compiler that implements the following:-

• Declare a floating-point variable (of type float)

• Declare an integer variable (of type int)

• Prompt the user to enter a floating-point number.

• Read a number from the keyboard into your floating-point variable

• Using casting, write the contents of your floating-point variable into your integer variable • Display the value of your integer variable.

1. In the following program, what would be the final output? Explain in

detail.

void copyarr( char ∗p1 , char p2 [ ] ) {

memcpy ( p2 , p1 , size of ( p1 ) ) ;

memcpy ( p2 , ‘ ‘ABCD’ ’ , 4 ) ;

}

int main ( ) {

char arr1 [ 100 ] ;

char arr2 [ 100 ] ;

printf( ‘ ‘ Enter a string : ’ ’ ) ;

scanf ( ‘ ‘%[ ˆ\n ] s ’ ’ , arr1 ) ;

copyarr ( arr1 , arr2 ) ;

printf ( ‘ ‘ \ n %s ’ ’ , arr2 ) ;

return 0 ;

}

Write a program to enter the numbers till the user wants and at the end it should display the

count of even, odd and prime numbers entered.

write a C code to add two polynomials having n number of unknown variables