C Exercises: Find angle between given hour and minute hands

C Programming Mathematics: Exercise-28 with Solution

Write a C program to find the angle between the hour and minute hands.

Example:
Input: int ha = 11
         int ma = 30
Output: Angle between hour and minute hands 165

Sample Solution:

C Code:

#include <stdio.h>
#include <math.h>
    
  int calcAngle(int ha, int ma) 
    { 
        if (ha == 12) 
            ha = 0; 
        if (ma == 60)  
            ma = 0; 
        int hour_angle = (int)(0.5 * (ha*60 + ma)); 
        int minute_angle = (int)(6*ma);   

        int angle = abs(hour_angle - minute_angle); 
        int ang = 360-angle;     
        return (ang > angle) ? angle : ang;
    }     
  
  int main(void)

    {
       int ha = 11;
       printf("\nAngles move by hour hand: %d",ha);
       int ma = 30;
       printf("\nAngles move by minute hand: %d",ma);
	   if (ha <0 || ma < 0 || ha > 12 || ma > 60) 
	   {
	      printf("\nWrong input..!"); 
	   }
	   else
	   {
		  printf("\nAngle between hour and minute hands %d",calcAngle(ha, ma)); 	  
	   }
    }

Sample Output:

Angles move by hour hand: 11
Angles move by minute hand: 30
Angle between hour and minute hands 165

Flowchart:

C Programming Code Editor:

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