Article | C Program To Find The Determinant of Matrix

To Find The Determinant of Matrix in program C

1. #include<stdio.h>
2. #include<conio.h>
3. #define LIMIT 10
4. void main()
5. {
6. int chckdgnl();
7. float deter();
8. float a[LIMIT][LIMIT],value;
9. int i,j,order;
10. clrscr();
11. printf("Enter order of determent :");
12. scanf("%d",&order);
13. for(i=0;i<order;i++)
14. {
15. for(j=0;j<order;j++)
16. {
17. printf("Enter (%d,%d) element of the determent :",i+1,j+1);
18. scanf("%f",&a[i][j]);
19. }
20. }
22. if(chckdgnl(a,order)==0)
23. value=0;
24. else
25. value=deter(a,order);
26. printf("Determinent Value :%f",value);
27. getch();
28. }
30. float deter(float a[][LIMIT],int forder)
31. {
32. int i,j,k;
33. float mult;
34. float deter=1;
35. for(i=0;i<forder;i++)
36. {
37. for(j=0;j<forder;j++)
38. {
39. mult=a[j][i]/a[i][i];
40. for(k=0;k<forder;k++)
41. {
42. if(i==j) break;
43. a[j][k]=a[j][k]-a[i][k]*mult;
44. }
45. }
46. }
47. for(i=0;i<forder;i++)
48. {
49. deter=deter*a[i][i];
50. }
51. return(deter);
52. }
55. int chckdgnl(float array[][LIMIT],int forder)
56. {
57. int i,j,k;
58. float nonzero;
59. for(i=0;i<forder;i++)
60. {
61. if(array[i][i]==0)
62. {
63. for(j=0;j<forder;j++)
64. {
65. if(array[i][j]!=0)
66. {
67. k=j;
68. break;
69. }
70. if(j==(forder)) //forder-1
71. return(0);
72. }
73. for(j=0;j<forder;j++)
74. {
75. array[j][i]=array[j][i]-array[j][k];
76. }
77. }
78. }
79. return(1);
80. }

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