Question

It is required to write a Matrix Calculator Program using C Programming Language that could only perform addition, subtraction, and multiplication of two matrices of appropriate dimensions. Your program should prompt the user to select a matrix operation from a list of options that contains the aforementioned operations. Then, the user should be prompted to enter the dimensions of the two operand matrices. Next, your program should prompt the user to enter the elements of each matrix row-wise. Your program should perform the selected matrix operation on operand matrices and display the result on the console. Use input validation loops to make sure that the user selected a valid matrix operation and that the user entered appropriate matrix dimensions for the selected operation. . Test your program by computing the following: D= A +B, E = A-B, and F= AC . Assuming that: 1.2 16.1 15 2.2 5.6 -8.9 -25.3 17.5 11.8 5.3 9.4 -6.7 120.1 -12.2 38.7 26.7 14.3 -12.5 7.2 2.5 12.3 -12.57 22 A= B = and C=19.2 18.2 -95.2 -30 17 7.9 68.2

Answer 1

Below is the code in C for the above question:

#include <stdio.h>

// function to find difference between two matrix
void Add(int row1,int col1,int row2,int col2,double A[][col1],double B[][col2]){
   // resultant matrix C.
   double C[row1][col1];
   int i,j;
  
   // finding sum.
   for(i=0;i<row1;i++){
       for(j=0;j<col1;j++){
           C[i][j] = A[i][j] + B[i][j];
       }
   }
  
   // displaying the result on console
   printf("\n Sum of matrices is :\n");
   for(i=0;i<row1;i++){
       for(j=0;j<col1;j++){
           printf("%.2lf ",C[i][j]);
       }
       printf("\n");
   }
}

// function to find difference between two matrix
void Sub(int row1,int col1,int row2,int col2,double A[][col1],double B[][col2]){
   // resultant matrix C.
   double C[row1][col1];
   int i,j;
  
   // finding difference
   for(i=0;i<row1;i++){
       for(j=0;j<col1;j++){
           C[i][j] = A[i][j] - B[i][j];
       }
   }
  
   // displaying the result on console
   printf("\n Difference of matrices is :\n");
   for(i=0;i<row1;i++){
       for(j=0;j<col1;j++){
           printf("%.2lf ",C[i][j]);
       }
       printf("\n");
   }
}

// function to find multiplication oftwo matrix A and B.
void Mul(int row1,int col1,int row2,int col2,double A[][col1],double B[][col2]){
   // resultant matrix C.
   double C[row1][col2];
   int i,j,k;
  
   // finding multiplication of two matrix
   for(i=0;i<row1;i++){
       for(j=0;j<col2;j++){
           C[i][j] = 0;
           for(k=0;k<col1;k++){
               C[i][j] += A[i][k]*B[k][j];
           }
       }
   }
  
   // displaying the result on console
   printf("\n Multiplication of matrices is :\n");
   for(i=0;i<row1;i++){
       for(j=0;j<col2;j++){
           printf("%.2lf ",C[i][j]);
       }
       printf("\n");
   }
}

int main()
{
   // choice variable of type integer.
   int choice;
  
   // loop validation for user choice
   while(1){
       printf("\nSelect and Operation:\n\n1. Addition\n2. Subtraction\n3. Multiplication\n\n\nYour Choice: ");
       scanf("%d",&choice);
      
       if(choice != 1 && choice != 2 && choice != 3){
           printf("\nError:\tInvalid choice!!\n");
           continue;
       }
       else break;
   }
  
   int row1,col1,row2,col2;
   // loop validation for dimension
   while(1){
       printf("Enter the dimension of matrix A: ");
       scanf("%d%d",&row1,&col1);
      
       printf("Enter the dimension of matrix B: ");
       scanf("%d%d",&row2,&col2);
      
       if(row1<0 || row2<0 || col1<0 || col2<0){
           printf("\nError:\tInvalid dimension!!\n");
           continue;
       }
       else break;
   }
  
   // creating matrix A and B of dimensions row1 x col1 and row2 x col2 resp.
   double A[row1][col1],B[row2][col2];
   int i,j;
  
   // getting elements of matrix A.
   printf("\nEnter the elements of matrix A\n");
   for(i=0;i<row1;i++){
       for(j=0;j<col1;j++){
           scanf("%lf",&A[i][j]);
       }
   }
  
   // getting elements of matrix B.
   printf("\nEnter the elements of matrix B\n");
   for(i=0;i<row2;i++){
       for(j=0;j<col2;j++){
           scanf("%lf",&B[i][j]);
       }
   }
  
   // using switch case for appropriate choice
   switch(choice)
   {
       case 1:
           // checks if dimesnions are same or not
           if(row1 == row2 && col1 == col2)
               Add(row1,col1,row2,col2,A,B);
           else
               printf("\nError:\tDimension should be equal!!\n");
           break;
       case 2:
           // checks if dimesnions are same or not
           if(row1 == row2 && col1 == col2)
               Sub(row1,col1,row2,col2,A,B);
           else
               printf("\nError:\tDimension should be equal!!\n");
           break;
       case 3:
           // checks the condition for multiplication of two matrix
           // i.e. column of first matrix must be equal to row of second matrix
           if(col1 == row2)
               Mul(row1,col1,row2,col2,A,B);
           else
               printf("\nError:\tDimension Mismatch!!\n");
           break;
   }
  
   return 0;
}

Refer to the screenshot attached below to better understand the code and indentation:

On 1 #include <stdio.h> 2 3 // function to find difference between two matrix 4 void Add(int rowl, int coli, int row, int col2, double A[][coll], double B[][col2]){ 5 // resultant matrix C. 6 double C[row1][col1]; 7 int i,j; 9 // finding sum. 10 for(i=0;i<rowl; i++){ 11 for(j=0; j<coll;j++){ C[i][j] = A[i][j] + B[i][j]; 13 } 14 15 16 // displaying the result on console 17 printf("\n Sum of matrices is : \n"); 18 for(i=0;i<rowl;i++){ for(j=0;j<coll; j++){ 20 printf("%.21f ",C[i][j]); 21 } 22 printf("\n"); 23 24 } 25 26 // function to find difference between two matrix 27 void Sub(int row, int coli, int row2, int col2, double A[][coll], double B[][col2]){ 28 1/ resultant matrix c. 29 double C[row][coli]; 30 int i, j; 31 32 // finding difference


도로 نہا 00 } } 33 for(i=0;i<rowl;i++){ 34 for(j=0; j<coll;j++){ 35 C[i][j] - A[i][j] - B[i][j]; 36 } 37 38 39 // displaying the result on console 40 printf("\n Difference of matrices is : \n"); 41 for(i=0;i<rowl;i++){ 42 for(j=0;j<coll;j++){ 43 printf("%.21f ",C[i][j]); 44 45 printf("\n"); 46 47 48 49 // function to find multiplication oftwo matrix A and B. 50 void Mul(int rowl, int coli, int row2, int col2, double A[][coll], double B[][col2]){ 51 // resultant matrix C. 52 double C[row][col2]; 53 int i, j,k; 55 // finding multiplication of two matrix 56 for(i=0;i<rowl;i++){ 57 for(j=0; j<col2; j++){ 58 C[i][j] = 0; 59 for (k=0; k<coll;k++){ 60 C[i][j] += A[i][k]*B[k][i]; 61 } 54 } 62 } 63 64 }


} } 65 // displaying the result on console 66 printf("\n Multiplication of matrices is :\n"); 67 for(i=0;i<rowl;i++){ 68 for(j=0; j<col2; j++){ 69 printf("%.21f ",C[i][j]); 70 71 printf("\n"); 72 } 73 74 75 int main() 76 { 77 // choice variable of type integer. 78 int choice; 79 80 // loop validation for user choice 81 while(1) { 82 printf("\nSelect an Operation:\n\n1. Addition\n2. Subtraction\n3. Multiplication\n\n\nYour Choice: "); 83 scanf("%d",&choice); 84 85 if (choice != 1 && choice != 2 && choice != 3){ 86 printf("\nError:\tInvalid choice!!\n"); 87 continue; 88 89 else break; 90 91 92 int rowl, coli, row2, col2; 93 // loop validation for dimension 94 while(1) { 95 printf("Enter the dimension of matrix A: "); 보 } } 1


LE scanf("%d%d", &rowi,&coll); printf("Enter the dimension of matrix B: "); scanf("%d%d",&row2, &col2); if (rowl<0 || row2<0 || coll< || col2<0){ printf("\nError:\tInvalid dimension!!\n"); continue; } else break; // creating matrix A and B of dimensions rowl x coll and row2 x col2 resp. double A[row1][col1], B[row2][col2]; int i, j; 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 TTUUR 1/ getting elements of matrix A. printf("\nEnter the elements of matrix A\n"); for(i=0;i<rowl;i++) { for(j=0;j<coll;j++){ scanf("%1f",&A[i][j]); } } LLE // getting elements of matrix B. printf("\nEnter the elements of matrix B\n"); for(i=0;i<row2;i++){ for(j=0;j<col2;j++){ scanf("%1f",&B[i][j]); } ܝܟ


// using switch case for appropriate choice switch(choice) ...... 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 case 1: // checks if dimesnions are same or not if (rowl == row2 && coll == co12) Add(rowl, coli, row2, col2,A,B); else printf("\nError: \tDimension should be equal!!\n"); break; case 2: // checks if dimesnions are same or not if(rowl == row2 && coll == col2) Sub(rowl, coli, row2, col2, A,B); else printf("\nError:\tDimension should be equal!!\n"); break; case 3: // checks the condition for multiplication of two matrix // i.e. column of first matrix must be equal to row of second matrix if(coll == row2) Mul (rowl, coli, row2, co12,A,B); else printf("\nError:\tDimension Mismatch!!\n"); break; ... ... return 0;


Output:

Select an Operation: 1. Addition 2. Subtraction 3. Multiplication Your Choice: 1 Enter the dimension of matrix A: 4 3 Enter the dimension of matrix B: 4 3 Enter the elements of matrix A 2.2 5.6 -8.9 - 25.3 17.5 11.8 5.3 9.4 -6.7 120.1 -12.2 38.7 Enter the elements of matrix B 1.2 26.7 14.3 16.1 -12.5 7.2 18.2 2.5 12.3 -95.2 7.9 68.2 Sum of matrices is : 3.40 32.30 5.40 -9.20 5.00 19.00 23.50 11.90 5.60 24.90 -4.30 106.90



Select an Operation: 1. Addition 2. Subtraction 3. Multiplication Your Choice: 2 Enter the dimension of matrix A: 4 3 Enter the dimension of matrix B: 4 3 Enter the elements of matrix A 2.2 5.6 -8.9 -25.3 17.5 11.8 5.3 9.4 -6.7 120.1 -12.2 38.7 Enter the elements of matrix B 1.2 26.7 14.3 16.1 -12.5 7.2 18.2 2.5 12.3 -95.2 7.9 68.2 Difference of matrices is : 1.00 - 21.10 -23.20 -41.40 30.00 4.60 - 12.90 6.90 -19.00 215.30 -20.10 -29.50



select an Operation: 1. Addition 2. Subtraction 3. Multiplication Your Choice: 3 Enter the dimension of matrix A: 4 3 Enter the dimension of matrix B: 3 2 Enter the elements of matrix A 2.2 5.6 -8.9 -25.3 17.5 11.8 5.3 9.4 -6.7 120.1 -12.2 38.7 Enter the elements of matrix B 15 -12.5 19.2 22 -30 17 Multiplication of matrices is : 407.52 -55.60 -397.50 901.85 460.98 26.65 406.26 -1111.75


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