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#1
July 26th, 2013, 02:28 PM
 piczim
Registered User

Join Date: Jun 2013
Posts: 17
Time spent in forums: 2 h 8 m 19 sec
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If statment help

I am wanting to write a program for a BMI calculator that eventually will record details for several entries.

However to start with I need to be able to just complete one calculation.

Below is my code which works up to the if statement what I am trying to do is once I have completed the calculation be able to take that result and use the if statement to indicate if the result is normal, under or over.

I don't know how to take the result and put it into the if statement.

Code:
```  #include <stdio.h>
#include <math.h>
int main()
{

float height, weight,bmi;

printf("Enter Weight in Kg's and Height in METERS  \n");
scanf("%f%f", &weight, &height );

bmi = weight/(height*2);

printf("Your BMI is %.2f\n",bmi);

scanf("%");

if("%f"<=25){
printf("your weight is normal\n");
}

return(0);```
Comments on this post
salem disagrees: xposter http://cboard.cprogramming.com/c-programming/158317-help-if-statement.html

#2
July 26th, 2013, 02:55 PM
 MrFujin
Lord of the Dance

Join Date: Oct 2003
Posts: 3,359
Time spent in forums: 2 Months 2 Weeks 4 Days 22 h 33 m 54 sec
Reputation Power: 1828
Try to separate the input with a space:
Code:
` scanf("%f %f", &weight, &height );`

What do you try to do with this:
Code:
```   scanf("%");

if("%f"<=25){```

You should use the proper variable (bmi) in the if-statement.

#3
July 26th, 2013, 04:53 PM
 dwise1_aol
Contributing User

Join Date: Jan 2003
Location: USA
Posts: 6,870
Time spent in forums: 3 Months 1 Day 8 h 48 m 58 sec
Reputation Power: 2199
That is utter nonsense.
Code:
```   scanf("%");

if("%f"<=25){```

The scanf does nothing. And the if statement is comparing the address with 25. Since the first K or so of memory belongs to the operating system, such as the interrupt vector table, I think it's a very safe guess that that string literal, which is co-located with the program image in RAM, is far greater than memory address 25.

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