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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <ctype.h>
  4.  
  5. typedef double Type;
  6. #define SCAN_FORMAT "%lf"
  7. #define PRINT_FORMAT "%g"
  8.  
  9. typedef struct jagged_rows {
  10. 	size_t n; //number of elements
  11. 	Type *elements;
  12. } JaggedArray_row;
  13.  
  14. typedef struct jagged_array {
  15. 	size_t n; //number of rows
  16. 	JaggedArray_row *rows;
  17. } JaggedArray;
  18.  
  19. JaggedArray *load(FILE *file){
  20. 	JaggedArray *ja = malloc(sizeof(*ja));
  21. 	if(ja == NULL){
  22. 		perror("malloc");
  23. 		exit(EXIT_FAILURE);
  24. 	}
  25. 	ja->n = 0;
  26. 	ja->rows = NULL;
  27.  
  28. 	int ch, has_value = 0;
  29. 	size_t rows = 0, cols = 0;
  30. 	while((ch = getc(file)) != EOF){
  31. 		if(isspace(ch)){
  32. 			if(ch == '\n' && has_value){
  33. 				++rows;
  34. 				has_value = cols = 0;
  35. 			}
  36. 			continue;
  37. 		}
  38. 		ungetc(ch, file);
  39. 		if(has_value){
  40. 			ja->rows[rows].elements = realloc(ja->rows[rows].elements, ++ja->rows[rows].n * sizeof(Type));//check omitted
  41. 			fscanf(file, SCAN_FORMAT, &ja->rows[rows].elements[cols++]);//check omitted
  42. 		} else {
  43. 			has_value = 1;
  44. 			ja->rows = realloc(ja->rows, ++ja->n * sizeof(*ja->rows));//check omitted
  45. 			ja->rows[rows].n = 0;
  46. 			ja->rows[rows].elements = malloc(++ja->rows[rows].n * sizeof(Type));//check omitted
  47. 			fscanf(file, SCAN_FORMAT, &ja->rows[rows].elements[cols++]);//check omitted
  48. 		}
  49. 	}
  50. 	return ja;
  51. }
  52.  
  53. int main(void) {
  54. 	JaggedArray *ja = load(stdin);
  55. 	for(int r = 0; r < ja->n; ++r){
  56. 		for(int c = 0; c < ja->rows[r].n; ++c){
  57. 			if(c)
  58. 				putchar(' ');
  59. 			printf(PRINT_FORMAT, ja->rows[r].elements[c]);
  60. 		}
  61. 		puts("");
  62. 		free(ja->rows[r].elements);
  63. 	}
  64. 	free(ja->rows);
  65. 	free(ja);
  66. 	return 0;
  67. }
Success #stdin #stdout 0s 2304KB
comments (?)
stdin
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2 3 1 
1 2 3 4 5 6
1 2 3 4 5
1 2 
1
stdout
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2 3 1
1 2 3 4 5 6
1 2 3 4 5
1 2
1
https://ideone.com/Uh4Abr
language:
C99 (gcc 8.3)
created:
9 years ago
visibility:
public

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