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Calcular o derterminante de uma matriz [Erro ao Compilar]

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Olá pessoal boa noite !

 

Estou tentando compilar o codigo abaixo, porém apresenta erro "error: invalid operands to binary * (have ‘int *’ and ‘int *’)
         vet[4] = matrix[0][0] * matrix[1][2] * matrix[2][1];"

 

#include<stdio.h>
  4 #define DIM 3
  5
  6 int main(void) {
  7
  8     int i,j,k;//i = linha j = coluna
  9     int vet[6]; //pDig = Diagonal Principal sDig Diagonal Secundaria
 10     int iDet;
 11
 12     int aVal;
 13     int matrix [DIM][DIM][DIM];
 14
 15     for(i=0; i<DIM; i++)
 16     {
 17         for(j=0; j<DIM; j++)
 18         {
 19              for(k=0; k<DIM; k++)
 20              {
 21
 22            printf("Enters why the values [%d][%d][%d]: ",i,j,k);
 23            scanf("%d",&aVal);
 24
 25             matrix[i][j][k] = aVal;
 26              }
 27         }
 28
 29     }
 30         vet[0] = matrix[0][0] * matrix[1][1] * matrix[2][2];
 31         vet[1] = matrix[0][1] * matrix[1][2] * matrix[2][0];
 32         vet[2] = matrix[0][2] * matrix[1][0] * matrix[2][1];
 33         vet[3] = matrix[0][2] * matrix[1][1] * matrix[2][0];
 34         vet[4] = matrix[0][0] * matrix[1][2] * matrix[2][1];
 35         vet[5] = matrix[0][1] * matrix[1][0] * matrix[2][2];
 36
 37         iDet = -(vet[0]+vet[1]+vet[2]) - vet[3]+vet[4]-vet[5];
 38
 39
 40         printf("Determinante: %d\n",iDet);
 41
 42         return 0;
 43
 44 }
 45

Bom muito obrigado e conto com todos.
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