Given two points A(x1, y1) and B(x2, y2), find the distance between them.
Formula To Calculate Distance Between Two Points using Pythagorean theorem
distance = sqrt( (x2 – x1) * (x2 – x1) + (y2 – y1) * (y2 – y1) );
Note: sqrt() is a builtin method present in math.h header file.
Related Read:
Basic Arithmetic Operations In C
Expected Output for the Input
User Input:
Enter point 1 (x1, y1)
1
1
Enter point 2 (x2, y2)
9
9
Output:
Distance between (1.00, 1.00) and (9.00, 9.00) is 11.31
Video Tutorial: C Program To Calculate Distance Between Two Points
[youtube https://www.youtube.com/watch?v=e4R-VhXp_k4]
Source Code: C Program To Calculate Distance Between Two Points
#include<stdio.h>
#include<math.h>
int main()
{
float x1, y1, x2, y2, distance;
printf("Enter point 1 (x1, y1)\n");
scanf("%f%f", &x1, &y1);
printf("Enter point 2 (x2, y2)\n");
scanf("%f%f", &x2, &y2);
distance = sqrt( (x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1) );
printf("Distance between (%0.2f, %0.2f) and (%0.2f, %0.2f) is %0.2f\n", x1, y1, x2, y2, distance);
return 0;
}
Output 1:
Enter point 1 (x1, y1)
0
0
Enter point 2 (x2, y2)
5
0
Distance between (0.00, 0.00) and (5.00, 0.00) is 5.00
Output 2:
Enter point 1 (x1, y1)
2
3
Enter point 2 (x2, y2)
10
8
Distance between (2.00, 3.00) and (10.00, 8.00) is 9.43
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