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- #include <stdio.h>
- #include <math.h>
- void zerar(int n,int m[][n]) {
- int i, j;
- for (i=0; i<n; i++) {
- for (j=0; j<n; j++) {
- m[i][j] = 0;
- }
- }
- }
- void printm(int n, int matriz[][n]) {
- int i,j;
- for (i=0; i<n; i++) {
- for (j=0; j<n; j++) {
- printf("\t%d", matriz[i][j]);
- }
- printf("\n");
- }
- }
- int det(int n, int matriz[][n]) {
- int i, j, k, x, y, soma=0, aux[10][10];
- zerar(n, aux);
- if (n < 1) {}
- else if (n == 1) {
- return matriz[0][0];
- }
- else if (n == 2) {
- soma = (matriz[0][0] * matriz[1][1]) - (matriz[0][1] * matriz[1][0]);
- return soma;
- }
- else {
- for (i=0; i<n; i++) {
- for (j=1, x=0; j<n; j++) {
- for (k=0, y=0; k<n; k++) {
- if (k == i) {
- continue;
- }
- else {
- printf("\n\n");
- printm(n-1, aux);
- aux[x][y] = matriz[j][k];
- printf("\nx=%d, y=%d, j=%d, k=%d, i=%d\n", x, y, j, k, i);
- y++;
- }
- }
- x++;
- }
- soma += matriz[0][i]*pow(-1, i+2)*det(n-1, aux);
- }
- return soma;
- }
- }
- int main()
- {
- int m[3][3] = {{4, 3, 2}, {1, 4, 5}, {2, 1, 2}};
- det(3, m);
- printf("%d", det(3, m));
- printf("\n\n");
- printm(3, m);
- printf("\n\n");
- }
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