79 lines
2.2 KiB
C
79 lines
2.2 KiB
C
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/*
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* C Program to Perform Matrix Multiplication using Recursion
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*/
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#include <stdio.h>
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void multiply(int, int, int [][10], int, int, int [][10], int [][10]);
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void display(int, int, int[][10]);
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int main()
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{
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int a[10][10], b[10][10], c[10][10] = {0};
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int m1, n1, m2, n2, i, j, k;
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printf("Enter rows and columns for Matrix A respectively: ");
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scanf("%d%d", &m1, &n1);
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printf("Enter rows and columns for Matrix B respectively: ");
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scanf("%d%d", &m2, &n2);
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if (n1 != m2)
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{
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printf("Matrix multiplication not possible.\n");
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}
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else
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{
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printf("Enter elements in Matrix A:\n");
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for (i = 0; i < m1; i++)
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for (j = 0; j < n1; j++)
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{
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scanf("%d", &a[i][j]);
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}
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printf("\nEnter elements in Matrix B:\n");
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for (i = 0; i < m2; i++)
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for (j = 0; j < n2; j++)
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{
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scanf("%d", &b[i][j]);
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}
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multiply(m1, n1, a, m2, n2, b, c);
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}
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printf("On matrix multiplication of A and B the result is:\n");
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display(m1, n2, c);
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}
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void multiply (int m1, int n1, int a[10][10], int m2, int n2, int b[10][10], int c[10][10])
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{
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static int i = 0, j = 0, k = 0;
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if (i >= m1)
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{
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return;
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}
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else if (i < m1)
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{
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if (j < n2)
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{
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if (k < n1)
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{
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c[i][j] += a[i][k] * b[k][j];
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k++;
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multiply(m1, n1, a, m2, n2, b, c);
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}
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k = 0;
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j++;
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multiply(m1, n1, a, m2, n2, b, c);
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}
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j = 0;
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i++;
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multiply(m1, n1, a, m2, n2, b, c);
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}
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}
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void display(int m1, int n2, int c[10][10])
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{
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int i, j;
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for (i = 0; i < m1; i++)
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{
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for (j = 0; j < n2; j++)
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{
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printf("%d ", c[i][j]);
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}
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printf("\n");
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}
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}
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