43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
/*
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*-----------------------------------------------------------------------------
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* file: matsub.c
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* desc: matrix substraction
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* by: ko shu pui, patrick
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* date: 24 nov 91 v0.1
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* revi:
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* ref:
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* [1] Mary L.Boas, "Mathematical Methods in the Physical Sciene,"
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* John Wiley & Sons, 2nd Ed., 1983. Chap 3.
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*
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*-----------------------------------------------------------------------------
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*/
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#include <stdio.h>
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#include "matrix.h"
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/*
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*-----------------------------------------------------------------------------
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* funct: mat_sub
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* desct: subtraction of two matrice
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* given: A, B = compatible matrice to be added
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* retrn: NULL if malloc() fails
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* else allocated matrix of A - B
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* comen:
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*-----------------------------------------------------------------------------
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*/
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MATRIX mat_sub( A, B )
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MATRIX A, B;
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{
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int i, j;
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MATRIX C;
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if ((C = mat_creat( MatRow(A), MatCol(A), UNDEFINED )) == NULL)
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return (NULL);
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for (i=0; i<MatRow(A); i++)
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for (j=0; j<MatCol(A); j++)
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{
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C[i][j] = A[i][j] - B[i][j];
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}
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return (C);
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}
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