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#include <stdio.h> typedef struct { int m[3][3]; } Matrix; void func(const Matrix *p, const Matrix *q, Matrix *r) { int i, j, k; for (i = 0; i < 3; i++) { for (j = 0; j < 3; j++) { for (k = 0; k < 3; k++) { r->m[i][j] += p->m[k][i] * q->m[j][k]; } } } } int main() { Matrix ary1 = { { {1, 2, 3}, {4, 5, 6}, {7, 8, 9}, } }; Matrix ary2 = { { {1, 2, 3}, {4, 5, 6}, {7, 8, 9}, } }; Matrix answer = { { { 0 } } }; int i, j; func(&ary1, &ary2, &answer); for (i = 0; i < 3; i++) { for (j = 0; j < 3; j++) { printf("%d ", answer.m[i][j]); } printf("\n"); } return 0; }
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