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  1. #include <stdio.h>
  2.  
  3. int readData(double data[], int size)	/* Change return type */
  4. {
  5.     FILE* fp;
  6.     fp = stdin; /* fopen("data.txt", "r"); temporary change to check */
  7.     int i;
  8.  
  9.     for (i = 0; i < size; i++)
  10.     {
  11.         if( fscanf(fp, "%lf", &data[i]) < 1) break; /* Added */
  12.         if(data[i] < 0)
  13.             printf("Negative data at %d\n", i);
  14.     }
  15.     size = i;
  16.  
  17.     printf("The array is: ");
  18.     for (i = 0; i < size; i++)
  19.     {
  20.         printf("%f ", data[i]);
  21.     }
  22.     /* fclose(fp); temporary */
  23.     printf("\n");
  24.  
  25.     return size;
  26. }
  27.  
  28. int main(void) {
  29. 	double arr[100];
  30. 	size_t size = readData(arr, 100);
  31. 	printf("Size of array = %u\n", size);
  32. 	return 0;
  33. }
  34.  
Success #stdin #stdout 0s 2296KB
comments (?)
stdin 
1.0
3.14
1.5
42
5.0
stdout 
The array is: 1.000000 3.140000 1.500000 42.000000 5.000000 
Size of array = 5
https://ideone.com/O9dCbC
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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