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double output

 
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double output
tygerberg
6 Feb, 2007 - 04:22 AM
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Hi I've made a small program that calculates yourhealth according to your length and weight, it displays the right answer, but sometimes displayes two answers. Can someone help me

CODE
#include <stdio.h>
main()
{
      float len, mas, ans;
      
      do {
      
      printf("Please enter your height: ");
      scanf("%f", &len);
      
      printf("Please enter your weight: ");
      scanf("%f", &mas);
      
      ans = mas / ( len * len );
      
      /* < 18.5  under weight
         between 18.5 and 24.9  normal
         between 25 and 29.9  over weight
         else( > 29.9 )  obese
      */
      
      if ( ans < 18.5 ) printf("Under weight %.2f\n", ans);
      if ((ans > 18.5) && (ans <= 24.9)) printf("Normal %.2f\n", ans);
      if ((ans > 25) && (ans <= 29.9))  printf("Over weight %.2f\n", ans);
      else printf("Obese %.2f\n", ans);
      
      printf("\n");
      
      } while ( ans <= 999 );
      
}
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horace
RE: Double Output
6 Feb, 2007 - 04:30 AM
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consider
CODE

    if ( ans < 18.5 ) printf("Under weight %.2f\n", ans);
      if ((ans > 18.5) && (ans <= 24.9)) printf("Normal %.2f\n", ans);
      if ((ans > 25) && (ans <= 29.9))  printf("Over weight %.2f\n", ans);
      else printf("Obese %.2f\n", ans);

assuming one of the first two conditions are true this will also execute the else
CODE

else printf("Obese %.2f\n", ans);

I think you need else statements with the previous ifs, e.g.
CODE

      if ( ans < 18.5 ) printf("Under weight %.2f\n", ans);
      else
        if ((ans > 18.5) && (ans <= 24.9)) printf("Normal %.2f\n", ans);
        else
           if ((ans > 25) && (ans <= 29.9))  printf("Over weight %.2f\n", ans);
           else printf("Obese %.2f\n", ans);
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AmitTheInfinity
RE: Double Output
6 Feb, 2007 - 04:30 AM
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The else is only for the last if. So whenever it matches with the 1st or 2nd if obviously it is false in case of 3rd if so it goes to else automatically and prints again...

making it if...else if...else will solve your problem.

well is that fromula is correct... huh.gif [I should take care of my health then.] biggrin.gif


oh horace is few seconds ahead me...[biggrin.gif]

This post has been edited by AmitTheInfinity: 6 Feb, 2007 - 04:32 AM
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