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  1. #define _CRT_SECURE_NO_WARNINGS
  2. #include <stdio.h>
  3. #include <math.h>
  4.  
  5. float sidelength(int numbx[], int numby[], int n, int n1)
  6. {
  7.     return sqrt(pow((numbx[n1] - numbx[n]), 2) + pow((numby[n1] - numby[n]), 2));//довжина сторони
  8. }    
  9.  
  10. void main()
  11. {
  12. 	float len[3], p, square;
  13. 	int x[3], y[3];
  14.  
  15.     for (int i = 0; i < 3; i++)
  16.     {
  17.         printf("\nEnter node x%d:", i);
  18.         scanf("%d", &x[i]);
  19.         printf("\nEnter node y%d:", i);
  20.         scanf("%d", &y[i]);
  21.         if(i > 0)
  22.            	len[i] = sidelength(x, y, i, i - 1);
  23.     }
  24.     len[0] = sidelength(x, y, 2, 0);
  25.     p = (len[0] + len[1] + len[2]) / 2;//(півпериметр)
  26.     square = sqrt(fabs(p * (p - len[0]) * (p - len[1]) * (p - len[2])));//(площа будь-якого трикутника)
  27.     printf("\nSquare: %f", square);
  28.     printf("\nLength: %f %f %f", len[0], len[1], len[2]);
  29. }
Success #stdin #stdout 0s 4692KB
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stdin
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stdout
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Enter node x0:
Enter node y0:
Enter node x1:
Enter node y1:
Enter node x2:
Enter node y2:
Square 0.500000
length 1.000000 1.414214 1.000000
https://ideone.com/0uaXSw
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

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