{"post":"

To subtract two matrices, we need two matrices having the same number of rows and columns. The subtraction is done by subtracting corresponding elements.

Algorithm:

Take input of number of rows and columns.
Take input of both the matrices.
Now, use C_i,j= A_i,j– B_i,j
Print matrix C.

Code:

#include <iostream>\nusing namespace std;\nvoid subtract(int[5][5], int[5][5], int, int);\nint display(int[5][5], int, int);\nint main()\n{\nint a[5][5], b[5][5], r1, c1, r2, c2;\ncout<<\"\\n Enter rows for first matrix: \";\ncin>>r1;\ncout<<\"\\n Enter columns for second matrix: \";\ncin>>c1;\ncout<<\"\\n Enter rows for first matrix: \";\ncin>>r2;\ncout<<\"\\n Enter columns for second matrix: \";\ncin>>c2;
\n// To check if columns of first matrix are equal to rows of second matrix
\nif (r1 != r2 || c1!=c2)\nreturn 0;
\n// Storing elements of first matrix.
\nprintf(\"\\nEnter elements of first matrix \\n\");
\nfor(int i=0; i<r1; i++)\n{\nfor(int j=0; j<c1; j++)\ncin>>a[i][j];
\n}\n
\n// Storing elements of second matrix.\ncout<<\"\\nEnter elements of second matrix\\n\";
\nfor(int i=0; i<r2; i++)\n{\nfor(int j=0; j<c2; j++)\ncin>>b[i][j];\n}\ncout<<\"\\n display a\\n\";\ndisplay(a, r1, c1);\ncout<<\"\\n display a\\n\";\ndisplay(b, r2, c2);\n//calling the function to subtract a and b. passing number of rows\n//and columns in both of them\nsubtract(a, b, r1, c1);\nreturn 0;\n}
\nvoid subtract(int a[5][5], int b[5][5], int row, int col)\n{\nint c[5][5];\n//input 0 for all values of c, in porder to remove\n//the garbage values assigned earlier\nfor(int i=0; i<row; i++)\n{\nfor(int j=0; j<col; j++)\nc[i][j]=0;\n}\n//we apply the same formula as above\nfor(int i=0; i<row; i++)\n{\nfor(int j=0; j<col; j++)\nc[i][j]=a[i][j]-b[i][j];\n}\n//to display matrix\ncout<<\"\\n Matrix c after Subtraction is:\\n\";\ndisplay(c, row, col);\n}\nint display(int c[5][5], int row, int col)\n{\nfor(int i=0; i<row; i++)\n{\nfor(int j=0; j<col; j++)\ncout<<c[i][j]<<\" \";\ncout<<\"\\n\";\n}\nreturn 0;\n}

Output:

Enter rows for first matrix: 3\nEnter columns for second matrix: 3\nEnter rows for first matrix: 3\nEnter columns for second matrix: 3\nEnter elements of first matrix\n76 35 24\n24 56 24\n86 25 75 \nEnter elements of second matrix \n5 7 8\n7 3 6\n6 3 7 \ndisplay a\n76 35 24\n24 56 24\n86 25 75 \ndisplay b\n5 7 8\n7 3 6\n6 3 7 \n

Matrix c after Subtraction is:\n71 28 16\n17 53 18\n80 22 68

\n","title":"Subtraction of matrices in C++","authorDetails":{"name":"Juhi Kamdar","slug":"juhi-kamdar"},"seo":{"title":"Program for Subtraction of matrices in C++"},"description":"To subtract two matrices, we need two matrices having the same size. The subtraction is done by subtracting corresponding elements. Program to add two matrices in C.","slug":"cpp/examples/subtraction-of-matrices-in-c/","articleId":"636a83487bb1ce5072622c63","bookmarkStatus":{"isBookmarked":false,"bookmarkId":null}}