Program to multiply two Matrix by taking data from user
Given two matrices, the task is to multiply them. The size and number of elements of matrices are to be read from the keyboard.
Examples:
Input: row1 = 2, col1 = 2,
mat1[][] = {{1, 2},
{3, 4}},
row2 = 2, col2 = 2,
mat2[][] = {{1, 1},
{1, 1}}
Output: {{3, 3},
{7, 7}}
Input: row1 = 2, col1 = 2,
mat1[][] = {{2, 4},
{3, 4}}
row1 = 2, col1 = 2,
mat2[][] = {{1, 2},
{1, 3}}
Output: {{6, 16},
{7, 18}}
Program:
C
// C program to multiply two matrices. #include <stdio.h> const int MAX = 100; // Function to print Matrix void printMatrix(int M[][MAX], int rowSize, int colSize) { for (int i = 0; i < rowSize; i++) { for (int j = 0; j < colSize; j++) printf("%d ", M[i][j]); printf("\n"); } } // Function to multiply two matrices A[][] and B[][] void multiplyMatrix(int row1, int col1, int A[][MAX], int row2, int col2, int B[][MAX]) { int i, j, k; // Matrix to store the result int C[MAX][MAX]; // Check if multiplication is Possible if (row2 != col1) { printf("Not Possible\n"); return; } // Multiply the two for (i = 0; i < row1; i++) { for (j = 0; j < col2; j++) { C[i][j] = 0; for (k = 0; k < row2; k++) C[i][j] += A[i][k] * B[k][j]; } } // Print the result printf("\nResultant Matrix: \n"); printMatrix(C, row1, col2); } // Driven Program int main() { int row1, col1, row2, col2, i, j; int A[MAX][MAX], B[MAX][MAX]; // Read size of Matrix A from user printf("Enter the number of rows of First Matrix: "); scanf("%d", &row1); printf("%d", row1); printf("\nEnter the number of columns of First Matrix: "); scanf("%d", &col1); printf("%d", col1); // Read the elements of Matrix A from user printf("\nEnter the elements of First Matrix: "); for (i = 0; i < row1; i++) { for (j = 0; j < col1; j++) { printf("\nA[%d][%d]: ", i, j); scanf("%d", &A[i][j]); printf("%d", A[i][j]); } } // Read size of Matrix B from user printf("\nEnter the number of rows of Second Matrix: "); scanf("%d", &row2); printf("%d", row2); printf("\nEnter the number of columns of Second Matrix: "); scanf("%d", &col2); printf("%d", col2); // Read the elements of Matrix B from user printf("\nEnter the elements of First Matrix: "); for (i = 0; i < row2; i++) { for (j = 0; j < col2; j++) { printf("\nB[%d][%d]: ", i, j); scanf("%d", &B[i][j]); printf("%d", B[i][j]); } } // Print the Matrix A printf("\n\nFirst Matrix: \n"); printMatrix(A, row1, col1); // Print the Matrix B printf("\nSecond Matrix: \n"); printMatrix(B, row2, col2); // Find the product of the 2 matrices multiplyMatrix(row1, col1, A, row2, col2, B); return 0; } |
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Python3
# Python3 program to multiply two matrices. MAX = 100 # Function to print Matrix def printMatrix(M, rowSize, colSize) : for i in range(rowSize) : for j in range(colSize) : print(M[i][j], end = " ") print() # Function to multiply two matrices # A[][] and B[][] def multiplyMatrix(row1, col1, A, row2, col2, B) : # Matrix to store the result C = [[0 for i in range(MAX)] for j in range(MAX)] # Check if multiplication is Possible if (row2 != col1) : print("Not Possible") return # Multiply the two for i in range(row1) : for j in range(col2) : C[i][j] = 0 for k in range(row2) : C[i][j] += A[i][k] * B[k][j]; # Print the result print("Resultant Matrix: ") printMatrix(C, row1, col2) # Driver Code if __name__ == "__main__" : A = [[0 for i in range(MAX)] for j in range(MAX)] B = [[0 for i in range(MAX)] for j in range(MAX)] # Read size of Matrix A from user row1 = int(input("Enter the number of rows of First Matrix: ")) col1 = int(input("Enter the number of columns of First Matrix: ")) # Read the elements of Matrix A from user print("Enter the elements of First Matrix: "); for i in range(row1) : for j in range(col1) : A[i][j] = int(input("A[" + str(i) + "][" + str(j) + "]: ")) # Read size of Matrix B from user row2 = int(input("Enter the number of rows of Second Matrix: ")) col2 = int(input("Enter the number of columns of Second Matrix: ")) # Read the elements of Matrix B from user print("Enter the elements of Second Matrix: "); for i in range(row2) : for j in range(col2) : B[i][j] = int(input("B[" + str(i) + "][" + str(j) + "]: ")) # Print the Matrix A print("First Matrix: ") printMatrix(A, row1, col1) # Print the Matrix B print("Second Matrix: ") printMatrix(B, row2, col2) # Find the product of the 2 matrices multiplyMatrix(row1, col1, A, row2, col2, B) # This code is contributed by Ryuga |
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Output:
Enter the number of rows of First Matrix: 2 Enter the number of columns of First Matrix: 3 Enter the elements of First Matrix: A[0][0]: 1 A[0][1]: 2 A[0][2]: 3 A[1][0]: 4 A[1][1]: 5 A[1][2]: 6 Enter the number of rows of Second Matrix: 3 Enter the number of columns of Second Matrix: 2 Enter the elements of First Matrix: B[0][0]: 1 B[0][1]: 2 B[1][0]: 3 B[1][1]: 4 B[2][0]: 5 B[2][1]: 6 First Matrix: 1 2 3 4 5 6 Second Matrix: 1 2 3 4 5 6 Resultant Matrix: 22 28 49 64
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