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#define N 3 int main(int argc, char ** argv) { int i,j,k; char buff[100]; double dbl1[N][N]; double dbl2[N][N]; printf("input %dx%d matrix A\n", N, N); for(i = 0 ; i < N ; i++) { for(j = 0 ; j < N ; j++) { fgets(buff, sizeof(buff), stdin); dbl1[i][j] = atol(buff); } } printf("input %dx%d matrix B\n", N, N); for(i = 0 ; i < N ; i++) { for(j = 0 ; j < N ; j++) { fgets(buff, sizeof(buff), stdin); dbl2[i][j] = atol(buff); } } printf("matrix A = \n"); for(i = 0 ; i < N ; i++) { for(j = 0 ; j < N ; j++) { printf("%lf,", dbl1[i][j]); } printf("\n"); } printf("\n"); printf("matrix B = \n"); for(i = 0 ; i < N ; i++) { for(j = 0 ; j < N ; j++) { printf("%lf,", dbl2[i][j]); } printf("\n"); } printf("\n"); printf("matrix A*B = \n"); for(i = 0 ; i < N ; i++) { for(j = 0 ; j < N ; j++) { double total = 0.0; for(k = 0 ; k < N ; k++) { total += dbl1[i][k] * dbl2[k][j]; } printf("%lf,", total); } printf("\n"); } return 0; }
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