1: /* matrix00add_func.c */
 2: #include <stdio.h>
 3: 
 4: /* 関数 print_mat のプロトタイプ宣言 */
 5: void print_mat( int row, int col, float x[ row ][ col ] );
 6: 
 7: /* 関数 add_mat のプロトタイプ宣言 */
 8: void add_mat( int row, int col,
 9:               float x[ row ][ col ],
10:               float y[ row ][ col ],
11:               float z[ row ][ col ] );
12: 
13: 
14: int main( void ){
15: 
16:   /* 変数の宣言 */
17:   int row, col;
18:   int rowa, cola;
19:   int rowb, colb;
20:   int rowc, colc;
21: 
22:   row = 2, col = 3;
23:   rowa = row, cola = col;
24:   rowb = row; colb = col;
25:   rowc = row; colc = col;
26: 
27:   /* 配列変数の宣言 */
28:   float a[ rowa ][ cola ];
29:   float b[ rowb ][ colb ];
30:   float c[ rowc ][ colc ];
31: 
32:   /* 配列の初期化 */
33:   a[ 0 ][ 0 ] = 2.3; a[ 0 ][ 1 ] = 0.2; a[ 0 ][ 2 ] = 0.1;
34:   a[ 1 ][ 0 ] = -0.3; a[ 1 ][ 1 ] = 0.0; a[ 1 ][ 2 ] = -0.5;
35: 
36:   b[ 0 ][ 0 ] = -1.0; b[ 0 ][ 1 ] = -0.1; b[ 0 ][ 2 ] = 1.8;
37:   b[ 1 ][ 0 ] = 0; b[ 1 ][ 1 ] = 2.2; b[ 1 ][ 2 ] = 2.5;
38: 
39:   /* 行列の和 c = a + b を計算 */
40:   add_mat( row, col, a, b, c );
41: 
42:   /* 行列 a の表示 */
43:   printf( " a =\n" );
44:   print_mat( rowa, cola, a );
45:   printf( "\n" );
46: 
47:   /* 行列 b の表示 */
48:   printf( " b =\n" );
49:   print_mat( rowb, colb, b );
50:   printf( "\n" );
51: 
52:   /* 行列 c = a + b の表示 */
53:   printf( " c = a + b\n" );
54:   print_mat( rowc, colc, c );
55:   printf( "\n" );
56: 
57:   return 0;
58: 
59: }
60: 
61: 
62: /* 関数 print_mat */
63: void print_mat( int row, int col, float x[ row ][ col ] ){
64: 
65:   /* カウンタ用変数の宣言 */
66:   int i, j;
67: 
68:   /* 行列の表示 */
69:   for ( i = 0; i < row; i = i + 1 ) {
70:     printf( " [" );
71:     for( j = 0; j < col; j = j + 1 ) {
72: 
73:       printf( " %5.2f ", x[ i ][ j ] );
74: 
75:     }
76:     printf( "]\n" );
77:   }
78: 
79: }
80: 
81: /* 関数 add_mat */
82: void add_mat( int row, int col,
83:               float x[ row ][ col ],
84:               float y[ row ][ col ],
85:               float z[ row ][ col ] ){
86: 
87:   /* カウンタ用変数の宣言 */
88:   int i, j;
89: 
90:   /* 行列の和を計算 */
91:   for ( i = 0; i < row; i = i + 1 ) {
92:     for ( j = 0; j < col; j = j + 1 ) {
93: 
94:       z[ i ][ j ] = x[ i ][ j ] + y[ i ][ j ];
95: 
96:     }
97:   }
98: 
99: }