matrix_exercises

codeforwin_c_exercises/array_and_matrix_programming_exercises/exercise23/exercise23.c

@@ -0,0 +1,46 @@
+/*
+Write a C program to read elements in two matrices and add elements of both matrices. 
+C program for addition of two matrix. 
+Matrix addition program in C. 
+Logic to add two matrix in C programming.
+*/
+
+#include<stdio.h>
+
+int main(){
+
+    int array1[3][3],array2[3][3];
+
+    printf("Enter elements in matrix A of size 3x3:");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            scanf("%d",&array1[i][j]);
+        }
+
+    }
+
+    printf("Enter elements in matrix B of size 3x3:");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            scanf("%d",&array2[i][j]);
+        }
+
+    }
+
+    printf("Sum of matrices A+B =\n");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            printf("%d ",(array1[i][j]+array2[i][j]));
+        }
+        printf("\n");
+    }
+
+
+    return 0;
+}

codeforwin_c_exercises/array_and_matrix_programming_exercises/exercise24/exercise24.c

@@ -0,0 +1,45 @@
+/*
+Write a C program to read elements in two matrices and find the difference of two matrices. 
+Program to subtract two matrices in C. 
+Logic to subtract two matrices in C programming.
+*/
+
+#include<stdio.h>
+
+int main(){
+
+    int array1[3][3],array2[3][3];
+
+    printf("Enter elements in matrix A of size 3x3:");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            scanf("%d",&array1[i][j]);
+        }
+
+    }
+
+    printf("Enter elements in matrix B of size 3x3:");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            scanf("%d",&array2[i][j]);
+        }
+
+    }
+
+    printf("Difference of both matrices A-B =\n");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            printf("%d ",(array1[i][j]-array2[i][j]));
+        }
+        printf("\n");
+    }
+
+
+    return 0;
+}

codeforwin_c_exercises/array_and_matrix_programming_exercises/exercise25/exercise25.c

@@ -0,0 +1,39 @@
+/*
+Write a C program to read elements in a matrix and perform scalar multiplication of matrix. 
+C program for scalar multiplication of matrix. 
+How to perform scalar matrix multiplication in C programming. 
+Logic to perform scalar matrix multiplication in C program.
+*/
+
+#include<stdio.h>
+
+int main(){
+
+    int array1[3][3],multiply;
+
+    printf("Enter elements in matrix A of size 3x3:");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            scanf("%d",&array1[i][j]);
+        }
+
+    }
+
+    printf("Enter any number to multiply with matrix A:");
+    scanf("%d",&multiply);
+
+
+    printf("Resultant matrix c.A =\n");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            printf("%d ",(array1[i][j] * multiply));
+        }
+        printf("\n");
+    }
+
+    return 0;
+}

codeforwin_c_exercises/array_and_matrix_programming_exercises/exercise26/exercise26.c

@@ -0,0 +1,61 @@
+/*
+Write a C program to read elements in two matrices and multiply them. 
+Matrix multiplication program in C. 
+How to multiply matrices in C. 
+Logic to multiply two matrices in C programming.
+*/
+
+#include<stdio.h>
+
+int main(){
+
+    int array1[3][3],array2[3][3],array3[3][3];
+    int sum ;
+    printf("Enter elements in matrix A of size 3x3:");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            scanf("%d",&array1[i][j]);
+        }
+
+    }
+
+    printf("Enter elements in matrix B of size 3x3:");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            scanf("%d",&array2[i][j]);
+        }
+
+    }
+
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            sum = 0;
+            for (int k = 0; k < 3; k++)
+            {
+                sum += (array1[i][k]*array2[k][j]);
+            }
+            array3[i][j] = sum;
+        }
+
+    }
+
+
+    printf("Product of matrix A * B =\n");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            printf("%d ",array3[i][j]);
+        }
+        printf("\n");
+    }
+
+
+    return 0;
+}

codeforwin_c_exercises/array_and_matrix_programming_exercises/exercise27/exercise27.c

@@ -0,0 +1,59 @@
+/*
+Write a C program to enter elements in two matrices and check whether both matrices are equal or not. 
+C program to check whether elements of two matrices are equal or not. 
+Logic to check if two matrices are equal or not in C programming.
+*/
+
+#include<stdio.h>
+
+int main(){
+
+    int array1[3][3],array2[3][3];
+    int flag;
+
+    printf("Enter elements in matrix A of size 3x3:");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            scanf("%d",&array1[i][j]);
+        }
+
+    }
+
+    printf("Enter elements in matrix B of size 3x3:");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            scanf("%d",&array2[i][j]);
+        }
+
+    }
+
+    flag = 1;
+
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            if (array1[i][j] != array2[i][j])
+            {
+                flag = 0;
+                break;
+            }
+
+        }
+    }
+
+    if (flag == 1)
+    {
+        printf("Matrix A is equal to Matrix B");
+    }
+    else
+    {
+        printf("Matrix A is NOT equal to Matrix B");
+    }
+
+    return 0;
+}

codeforwin_c_exercises/array_and_matrix_programming_exercises/exercise28/exercise28.c

@@ -0,0 +1,38 @@
+/*
+Write a C program to read elements in a matrix and find the sum of main diagonal (major diagonal) elements of matrix. 
+Find sum of all elements of main diagonal of a matrix. 
+Logic to find sum of main diagonal elements of a matrix in C programming.
+*/
+#include<stdio.h>
+
+int main(){
+
+    int array[3][3];
+    int sum = 0; 
+
+
+    printf("Enter elements in matrix of size 3x3:");
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            scanf("%d",&array[i][j]);
+        }
+
+    }
+
+    for (int i = 0; i < 3; i++)
+    {
+        for (int j = 0; j < 3; j++)
+        {
+            if (i == j)
+            {
+                sum += array[i][j];
+            }
+        }
+    }
+
+    printf("Sum of main diagonal elements = %d\n",sum);
+
+    return 0;
+}

codeforwin_c_exercises/array_and_matrix_programming_exercises/exercise29/exercise29.c

@@ -0,0 +1,40 @@
+/*
+Write a C program to read elements in a matrix and find the sum of minor diagonal (opposite diagonal) elements. 
+C program to calculate sum of minor diagonal elements. 
+Logic to find sum of opposite diagonal elements of a matrix in C programming.
+*/
+
+#include<stdio.h>
+#define SIZE 3
+
+int main(){
+
+    int array[SIZE][SIZE];
+    int sum = 0; 
+
+
+    printf("Enter elements in matrix of size 3x3:");
+    for (int i = 0; i < SIZE; i++)
+    {
+        for (int j = 0; j < SIZE; j++)
+        {
+            scanf("%d",&array[i][j]);
+        }
+
+    }
+
+    for (int i = 0; i < SIZE; i++)
+    {
+        for (int j = SIZE-1; j >= 0; j--)
+        {
+            if ((i+j)==(SIZE-1) )
+            {
+                sum += array[i][j];
+            }
+        }
+    }
+
+    printf("Sum of minor elements = %d\n",sum);
+
+    return 0;
+}

codeforwin_c_exercises/array_and_matrix_programming_exercises/exercise30/exercise30.c

@@ -0,0 +1,46 @@
+/*
+Write a C program to read elements in a matrix and find the sum of elements of each row and columns of matrix. 
+C program to calculate sum of rows and columns of matrix. 
+Logic to find sum of each row and columns of a matrix in C programming.
+*/
+#include<stdio.h>
+#define SIZE 3
+
+int main(){
+
+    int array[SIZE][SIZE];
+    int sum; 
+
+
+    printf("Enter elements in matrix of size 3x3:");
+    for (int i = 0; i < SIZE; i++)
+    {
+        for (int j = 0; j < SIZE; j++)
+        {
+            scanf("%d",&array[i][j]);
+        }
+
+    }
+
+    for (int i = 0; i < SIZE; i++)
+    {
+        sum = 0;
+        for (int j = 0; j < SIZE; j++)
+        {
+            sum += array[i][j];
+        }
+        printf("Sum of elements of Row %d = %d\n",i+1,sum);
+    }
+
+    for (int i = 0; i < SIZE; i++)
+    {
+        sum = 0;
+        for (int j = 0; j < SIZE; j++)
+        {
+            sum += array[j][i];
+        }
+        printf("Sum of elements of Column %d = %d\n",i+1,sum);
+    }
+
+    return 0;
+}