Question 01
Write a C program that generates a multiplication table up to 10x10 using nested for loops. Each cell in the table should display the product of the row and column numbers.
Answer 01
#include <stdio.h>
void main()
{
for (int i = 1; i <= 10; i++)
{
for (int j = 1; j <= 10; j++)
{
printf("%d\t", i * j);
}
printf("\n");
}
}Question 02
Write a C program that prints a right-aligned triangle of asterisks (*). The triangle should have 5 rows, with the first row containing 1 asterisk, the second row containing 2 asterisks, and so on, up to the fifth row, which should contain 5 asterisks.
For example, if the number of rows is 5, the output should be:
*
**
***
****
*****If the number of rows is 6, the output should be:
*
**
***
****
*****
******Answer 02
#include <stdio.h>
void main()
{
int rows = 5;
for (int i = 1; i <= rows; i++)
{
// Print spaces for alignment
for (int j = 1; j <= rows - i; j++)
{
printf(" ");
}
// Print asterisks
for (int k = 1; k <= i; k++)
{
printf("*");
}
printf("\n");
}
}Question 03
Write a C program that displays a pyramid of numbers. The pyramid should have 5 rows, with each row displaying the row number repeated. The first row should contain 1, the second row should contain 2 twice, and so on, up to the fifth row, which contains the number 5 five times.
The output should be:
1
2 2
3 3 3
4 4 4 4
5 5 5 5 5Answer 03
#include <stdio.h>
void main()
{
int rows = 5;
for (int i = 1; i <= rows; i++)
{
// Print spaces for alignment
for (int j = 1; j <= rows - i; j++)
{
printf(" ");
}
// Print numbers
for (int k = 1; k <= i; k++)
{
printf("%d ", i);
}
printf("\n");
}
}Question 04
Write a C program that generates a checkerboard pattern of ‘*‘ and ‘#‘ characters. The pattern should be 8x8, with alternating symbols in each row, so that it resembles a checkerboard. The output should be:
* # * # * # * #
# * # * # * # *
* # * # * # * #
# * # * # * # *
* # * # * # * #
# * # * # * # *
* # * # * # * #
# * # * # * # * Answer 04
#include <stdio.h>
void main()
{
int size = 8;
for (int i = 0; i < size; i++)
{
for (int j = 0; j < size; j++)
{
if ((i + j) % 2 == 0)
{
printf("* ");
}
else
{
printf("# ");
}
}
printf("\n");
}
}Question 05
Write a C program that finds and prints all pairs of numbers in an array whose sum is equal to a given target value.
For example, if the array is {1, 2, 3,
4, 5, 6, 7}, and the target value is 7, the output should be:
Pairs with sum 7:
(1, 6)
(2, 5)
(3, 4)Answer 05
#include <stdio.h>
void main()
{
int arr[] = {1, 2, 3, 4, 5, 6, 7};
int target = 7;
int n = sizeof(arr) / sizeof(arr[0]);
printf("Pairs with sum %d:\n", target);
for (int i = 0; i < n; i++)
{
for (int j = i + 1; j < n; j++)
{
if (arr[i] + arr[j] == target)
{
printf("(%d, %d)\n", arr[i], arr[j]);
}
}
}
}