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# matrix opreation in c

Home Forums C Programming matrix opreation in c

• This topic has 2 replies, 2 voices, and was last updated 7 years, 6 months ago by Anonymous.
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• #2254 Anonymous
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Write a C program for the matrix operations. In particular,
write the following functions:

a) Function
int ** allocMatrix(int m, int n)
that will allocates, using malloc, space for an mXn matrix.

b) Function
void freeMatrix(int **a, int m)
to free up the memory allocated for an mXn matrix.
(Why do we not need “n” as an argument here?)

c) Function
void readMatrix(int **a, int m, int n)

d) Function
void printMatrix(int **a, int m, int n)
that prints an mXn matrix

e) Function
int ** mulMatrix(int **a, int **b, int m, int n, int p)
that multiplies an mXn matrix with an nXp matrix. The
result is an mXp matrix.

f) Function
int ** mul3Matrix(int **a, int **b, int **c,
int m, int n, int p, int q)
that multiplies 3 matrices a, b and c of sizes mXn,
nXp and pXq respectively.

Use mulMatrix to compute intermediate result. Any
intermediate matrix should be freed once its use is over.

Your main function should use these functions to read three matrices and
multiply them.

A sample run is (user inputs should be obvious) :

\$ ./a.out
enter the number m of rows of first matrix: 3
enter the number n of columns of first matrix/rows of second matrix: 2
enter the number n of columns of second matrix/rows of third matrix: 1
enter the number p of columns of third matrix: 2
enter the first matrix:
enter  th entry: 2
enter  th entry: 3
enter  th entry: 4
enter  th entry: 2
enter  th entry: 4
enter  th entry: 5
enter the second matrix:
enter  th entry: 2
enter  th entry: 3
enter the third matrix:
enter  th entry: 1
enter  th entry: 0
The product of the matrices:
2 3
4 2
4 5
and
2
3
and
1 0
is
13 0
14 0
23 0

• #3659 Anonymous
Inactive Anonymous