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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. struct mat_int{
  5. 	int rows;
  6. 	int cols; // used size
  7. 	int size;
  8. 	int* val;
  9. };
  10. void mat_alloc(struct mat_int* p_mat, int row_size, int col_size){
  11. 	p_mat->rows = row_size;
  12. 	p_mat->cols = col_size;
  13. 	p_mat->size = row_size * col_size;
  14. 	p_mat->val = (int*)malloc(p_mat->size * sizeof(int));
  15. 	return p_mat;
  16. }
  17.  
  18. void mat_print(const struct mat_int* p_mat){
  19. 	for(int p=0; p<p_mat->rows; p++){
  20. 		printf("[ ");
  21. 		for(int q=0; q<p_mat->cols; q++){
  22. 			printf("%d ", p_mat->val[p_mat->cols*p + q]);
  23. 		}
  24. 		printf("]\n");
  25. 	}
  26. }
  27.  
  28. int main(){
  29. 	struct mat_int mat;
  30. 	mat_alloc(&mat, 3, 3);
  31.  
  32. 	int i=0;
  33. 	for(int i=0; i<mat.size; i++){
  34. 		mat.val[i] = i;
  35. 	}
  36.  
  37. 	mat_print(&mat);
  38. 	return 0;
  39. }
Success #stdin #stdout 0s 9424KB
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https://ideone.com/MSPxJT
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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