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   avenge72
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http://www.hackerschool.org/HS_Boards/zboard.php?id=QNA_programming&no=1360 [º¹»ç]


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#include <stdio.h>

#define rows 2
#define cols 3

typedef int matrixA[rows][cols];
typedef int matrixB[cols][rows];
typedef int resultC[rows][rows];

void multiply(resultC r, matrixA a, matrixB b);
void display(resultC r, int M);

int main(void)
{
        matrixA a = {{1, 2, 2}, {2, 3, 1}};
        matrixB b = {{1, 2}, {1, 3}, {1, 2}};
        resultC r = {0};

        int i, j;
        for(i = 0; i < rows; i++){
                for(j = 0; j < cols; j++){
                        printf("%4d", a[i][j]);
                }
                printf("\n");
        }
        printf("\n");

        display(b, cols);
        printf("À§ µÎ Çà·ÄÀÇ °öÀº ´ÙÀ½ÀÔ´Ï´Ù.\n");
        multiply(r, a, b);
        display(r, rows);

        return 0;
}

void multiply(resultC r, matrixA a, matrixB b){
        int i, j, k;
        for(i = 0; i < rows; i++){
                for(j = 0; j < rows; j++){
                        for(k = 0; k < cols; k++){
                                //r[i][j] += a[i][k] * b[k][j];
                                *(r[i] + j) += *(a[i] + k)* *(b[k] + j);
                        }
                }
        }
}

void display(resultC r, int M){
        int i, j;
        for(i = 0; j < M; i++){
                for(j = 0; j < rows; j++){
                        printf("%4d", r[i][j]);
                }
                printf("%4d");
        }
        printf("%4d");
}

  Hit : 3612     Date : 2007/07/03 08:42



    
jin1055 Àú..Áß°£¿¡ Á˼ÛÇѵ¥¿ä typedef¶õ°Ç ¹º°¡¿ä?? 2007/07/03  
Mephist display ÇÔ¼öÀÇ Ã¹¹ø° for ¹®¿¡¼­.... i=0; j<rows; i++ ·Î µÇ¾î Àֳ׿ä. 2007/07/06  
Mephist j<rows ¸¦ i<rows ·Î~~ ¼öÁ¤~ 2007/07/06  
blue21 Mephist»ç¸¶´Ô~ 2007/07/21  
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