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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. void zerar(int n,int m[][n]) {
  5.     int i, j;
  6.     for (i=0; i<n; i++) {
  7.         for (j=0; j<n; j++) {
  8.             m[i][j] = 0;
  9.         }
  10.     }
  11. }
  12.  
  13. void printm(int n, int matriz[][n]) {
  14.     int i,j;
  15.     for (i=0; i<n; i++) {
  16.         for (j=0; j<n; j++) {
  17.             printf("\t%d", matriz[i][j]);
  18.         }
  19.         printf("\n");
  20.     }
  21. }
  22.  
  23. int det(int n, int matriz[][n]) {
  24.     int i, j, k, x, y, soma=0, aux[n-1][n-1];
  25.     zerar(n, aux);
  26.     if (n < 1) {}
  27.     else if (n == 1) {
  28.         return matriz[0][0];
  29.     }
  30.     else if (n == 2) {
  31.         soma = (matriz[0][0] * matriz[1][1]) - (matriz[0][1] * matriz[1][0]);
  32.         return soma;
  33.     }
  34.     else {
  35.         for (i=0; i<n; i++) {
  36.             for (j=1, x=0; j<n; j++) {
  37.                 for (k=0, y=0; k<n; k++) {
  38.                     if (k == i) {
  39.                         continue;
  40.                     }
  41.                     else {
  42.                         printf("\n\n");
  43.                         printm(n-1, aux);
  44.                         aux[x][y] = matriz[j][k];
  45.                         printf("\nx=%d, y=%d, j=%d, k=%d, i=%d\n", x, y, j, k, i);
  46.                         y++;
  47.                     }
  48.                 }
  49.                 x++;
  50.             }
  51.             soma += matriz[0][i]*pow(-1, i+2)*det(n-1, aux);
  52.         }
  53.         return soma;
  54.     }
  55. }
  56.  
  57.  
  58. int main()
  59. {
  60.     int m[3][3] = {{4, 3, 2}, {1, 4, 5}, {2, 1, 2}};
  61.     det(3, m);
  62.     printf("%d", det(3, m));
  63.     printf("\n\n");
  64.     printm(3, m);
  65.     printf("\n\n");
  66. }
Success #stdin #stdout 0s 2156KB
comments (?)
stdin 
Standard input is empty
stdout 

	0	0
	0	0

x=0, y=0, j=1, k=1, i=0


	4	0
	0	0

x=0, y=1, j=1, k=2, i=0


	4	5
	0	0

x=1, y=0, j=2, k=1, i=0


	4	5
	1	0

x=1, y=1, j=2, k=2, i=0


	4	5
	1	2

x=0, y=0, j=1, k=0, i=1


	1	5
	1	2

x=0, y=1, j=1, k=2, i=1


	1	5
	1	2

x=1, y=0, j=2, k=0, i=1


	1	5
	2	2

x=1, y=1, j=2, k=2, i=1


	1	5
	2	2

x=0, y=0, j=1, k=0, i=2


	1	5
	2	2

x=0, y=1, j=1, k=1, i=2


	1	4
	2	2

x=1, y=0, j=2, k=0, i=2


	1	4
	2	2

x=1, y=1, j=2, k=1, i=2


	0	0
	0	0

x=0, y=0, j=1, k=1, i=0


	4	0
	0	0

x=0, y=1, j=1, k=2, i=0


	4	5
	0	0

x=1, y=0, j=2, k=1, i=0


	4	5
	1	0

x=1, y=1, j=2, k=2, i=0


	4	5
	1	2

x=0, y=0, j=1, k=0, i=1


	1	5
	1	2

x=0, y=1, j=1, k=2, i=1


	1	5
	1	2

x=1, y=0, j=2, k=0, i=1


	1	5
	2	2

x=1, y=1, j=2, k=2, i=1


	1	5
	2	2

x=0, y=0, j=1, k=0, i=2


	1	5
	2	2

x=0, y=1, j=1, k=1, i=2


	1	4
	2	2

x=1, y=0, j=2, k=0, i=2


	1	4
	2	2

x=1, y=1, j=2, k=1, i=2
22

	4	3	2
	1	4	5
	2	1	2
https://ideone.com/EUo35A
language:
C (gcc 8.3)
created:
9 years ago
visibility:
secret

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