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- ask input and output file names

- open input and output files

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- m = read size of matrix

- x = create array of size m by m

- read m*m values into x

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- m = read size of matrix

- y = create array of size m by m

- read m*m values into y

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- finding sum

- u = create array of size m by m

- for (i = 0 to m-1) for (j = 0 to m-1) u[i][j] = x[i][j] + y[i][j]

- print m

- print u

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- finding product

- v = create array of size m by m

- for (i = 0 to m-1) for (j = 0 to m-1) { temp = 0 for (k = 0 to m-1) temp = temp + x[i][k]*y[k][j] v[i][j] = temp }

- print m

- print v

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///////// Java /////////