Programming for Problem Solving [ Lab Programs ]

Write a C program that uses functions to perform Multiplication of Two Matrices

Algorithm


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Flowchart

C Programming

// Multiplication of Two Matrices 

#include <stdio.h>

// Function to perform matrix multiplication
void multiplyMatrices(int A[10][10], int B[10][10], int result[10][10], int rowA, int colA, int rowB, int colB) {
    int i,j,k;
    for (i = 0; i < rowA; i++) {
        for (j = 0; j < colB; j++) {
            result[i][j] = 0;		// Initializing the result matrix with 0
            for (k = 0; k < colA; k++) {
                result[i][j] += A[i][k] * B[k][j];
            }
        }
    }
}

// Function to input matrix elements
void inputMatrix(int matrix[10][10], int rows, int cols) {
    int i,j;
    printf("Enter elements of the matrix (%dx%d):\n", rows, cols);
    for (i = 0; i < rows; i++) {
        for (j = 0; j < cols; j++) {
            scanf("%d", &matrix[i][j]);
        }
    }
}

// Function to display a matrix
void displayMatrix(int matrix[10][10], int rows, int cols) {
    int i,j;
    for (i = 0; i < rows; i++) {
        for (j = 0; j < cols; j++) {
            printf("%d ", matrix[i][j]);
        }
        printf("\n");
    }
}

int main() {
    int A[10][10], B[10][10], result[10][10];
    int rowA, colA, rowB, colB;

    // Input matrix dimensions
    printf("Enter the number of rows and columns for Matrix A: ");
    scanf("%d %d", &rowA, &colA);

    printf("Enter the number of rows and columns for Matrix B: ");
    scanf("%d %d", &rowB, &colB);

    // Check if multiplication is possible (columns of A must be equal to rows of B)
    if (colA != rowB) {
        printf("Matrix multiplication is not possible. The number of columns of A must be equal to the number of rows of B.\n");
        return 1; // Exit the program if multiplication is not possible
    }

    // Input matrices A and B
    printf("Input matrix A:\n");
    inputMatrix(A, rowA, colA);

    printf("Input matrix B:\n");
    inputMatrix(B, rowB, colB);

    // Perform matrix multiplication
    multiplyMatrices(A, B, result, rowA, colA, rowB, colB);

    // Display the result
    printf("\nMatrix A:\n");
    displayMatrix(A, rowA, colA);

    printf("\nMatrix B:\n");
    displayMatrix(B, rowB, colB);

    printf("\nResultant Matrix (A * B):\n");
    displayMatrix(result, rowA, colB);

    return 0;
}

OUTPUT

Enter the number of rows and columns for Matrix A: 3 3
Enter the number of rows and columns for Matrix B: 3 3
Input matrix A:
Enter elements of the matrix (3x3):
1 2 3 
4 5 6
7 8 9
Input matrix B:
Enter elements of the matrix (3x3):
1 0 0
0 1 0
0 0 1

Matrix A:
 1  2  3 
 4  5  6 
 7  8  9 

Matrix B:
 1  0  0 
 0  1  0 
 0  0  1 

Resultant Matrix (A * B):
 1  2  3 
 4  5  6 
 7  8  9

C Programming Practice Problems

Simple Numeric Problems

1. Write a program for finding the max and min from the three numbers. View Solution

2. Write the program for the simple, compound interest. View Solution

3. Write a program that prints a multiplication table for a given number and the number of rows in the table. View Solution

4. Write a program that shows the binary equivalent of a given positive number between 0 to 255. View Solution

Expression Evaluation

1. Write a C program, which takes two integer operands and one operator from the user, performs the operation and then prints the result. (Consider the operators +,-,*, /, % and use Switch Statement). View Solution

2. Write a program that finds if a given number is a prime number. View Solution

3. Write a C program to find the sum of individual digits of a positive integer and test given number is palindrome. View Solution

4. A Fibonacci sequence is defined as follows: the first and second terms in the sequence are 0 and 1. Subsequent terms are found by adding the preceding two terms in the sequence. Write a C program to generate the first n terms of the sequence. View Solution

Arrays, Pointers and Functions

1. Write a C program to find the minimum, maximum and average in an array of integers. View Solution

2. Write a C program that uses functions to perform Addition of two matrices. View Solution

3. Write a C program that uses functions to perform Multiplication of two matrices. View Solution

4. Write a program for reading elements using a pointer into an array and display the values using the array. View Solution

5. Write a program for display values reverse order from an array using a pointer. View Solution

Files

1. Write a C program which copies one file to another, replacing all lowercase characters with their uppercase equivalents. View Solution

2. Write a C program to merge two files into a third file (i.e., the contents of the first file followed by those of the second are put in the third file). View Solution

Strings

1. Write a C program that uses functions to insert a sub-string into a given main string from a given position View Solution

2. Write a C program that uses functions to delete n Characters from a given position in a given string View Solution

3. Write a C program to determine if the given string is a palindrome or not (Spelled same in both directions with or without a meaning like madam, civic, noon, abcba, etc.) View Solution

4. Write a C program that displays the position of a character ch in the string S or – 1 if S doesn’t contain ch. View Solution

5. Write a C program to count the lines, words and characters in a given text. View Solution

Sorting and Searching

1. Write a C program that uses non-recursive function to search for a Key value in a given list of integers using linear search method. View Solution

2. Write a C program that uses non-recursive function to search for a Key value in a given sorted list of integers using binary search method. View Solution

3. Write a C program that implements the Bubble sort method to sort a given list of integers in ascending order. View Solution

4. Write a C program that sorts the given array of integers using selection sort in descending orde. View Solution

5. Write a C program that sorts the given array of integers using insertion sort in ascending order. View Solution

6. Write a C program that sorts a given array of names. View Solution

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