#include <cstdlib>
#include <iostream>

using namespace std;
double weightInKilograms, heightInMeters, bMI; //variable declarations of height and weight

int main(int argc, char *argv[])
{
cout << "::::::::::: FROM THE DEPARTMENT OF HEALTH AND HUMAN SERVICES. :::::::::::::\n\n";
cout << " :::::::::::::: Body Mass Index (BMI) CALCULATOR. :::::::::::::::\n\n\n\n";

cout << "enter your weight in kilograms: ";//displays message to get weight
cin >> weightInKilograms;//gets the input for weight

cout << "\n";

cout << "enter your height in meters: ";//displays message to get height
cin >> heightInMeters;//gets the input for height

cout << "\n";

bMI = weightInKilograms / (heightInMeters * heightInMeters); //calculates the BMI

cout << "your weight in Kg is " << weightInKilograms << "kg \n" << endl;
cout << "your height in meters is " << heightInMeters << "m \n" << endl;
cout << "your body mass index is "<< bMI << endl;

if ( bMI < 18.5)
cout<<"you are underweight\n\n";

if ( 18.5 <= bMI && bMI == 24.9)
cout << "your BMI is normal\n";

if (25 >= bMI && bMI == 29.9)
cout << "you are overweight\n";

if ( bMI >= 30 )
cout << "you are obese!!\n";

cout << "::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::" << endl;
cout << "DISCLAIMER: Though this calculator is accurate according to the bmi calculation,\but it dosen't put to consideration your body build which may vary the initial\ gotten result. \n";
cout << "&&&&&&&&:::::::::: APP BUILT BY DIKACHI :::::::::::::&&&&&&&&\n" << endl;
system("PAUSE";
return EXIT_SUCCESS;
}

//am stil a novice and am studying with the book, c++ how to program 8th edition. i just need corrections to why it is misbehaving

Your control statements should be in the format
if .......
else if ......
else if

What errors are shown? They'll give you a hint on where you went wrong

no closing bracket here

system("PAUSE" ;

it didn't show any syntax error, I didn't get any error wen compiling and linking. Just dat the results when i run the program is not the expected result, like i feel itz from the conditional statement dat I got it wrong

Movingcoil: it didn't show any syntax error, I didn't get any error wen compiling and linking. Just dat the results when i run the program is not the expected result, like i feel itz from the conditional statement dat I got it wrong

what were you trying to do?

lordZOUGA:
what were you trying to do?

okay this is a body mass calculator ie bmi calculator that has values of bmi<18.5 to read as being underweight, 18.5<=bmi<25 is normal, 25<= bmi <30 is over weight, and bmi > 30 is obese, though I did small adjustments to the thing. This is a kind of assignment they gave in the first 3 chapters

Movingcoil: okay this is a body mass calculator ie bmi calculator that has values of bmi<18.5 to read as being underweight, 18.5<=bmi<25 is normal, 25<= bmi <30 is over weight, and bmi > 30 is obese, though I did small adjustments to the thing. This is a kind of assignment they gave in the first 3 chapters

then you should replace this statement
if ( 18.5 <= bMI && bMI == 24.9)
and other occurences with
if ( 18.5 <= bMI && bMI <= 24.9)

Movingcoil: #include <cstdlib>
#include <iostream>

using namespace std;
double weightInKilograms, heightInMeters, bMI; //variable declarations of height and weight

int main(int argc, char *argv[])
{
cout << "::::::::::: FROM THE DEPARTMENT OF HEALTH AND HUMAN SERVICES. :::::::::::::\n\n";
cout << " :::::::::::::: Body Mass Index (BMI) CALCULATOR. :::::::::::::::\n\n\n\n";

cout << "enter your weight in kilograms: ";//displays message to get weight
cin >> weightInKilograms;//gets the input for weight

cout << "\n";

cout << "enter your height in meters: ";//displays message to get height
cin >> heightInMeters;//gets the input for height

cout << "\n";

bMI = weightInKilograms / (heightInMeters * heightInMeters); //calculates the BMI

cout << "your weight in Kg is " << weightInKilograms << "kg \n" << endl;
cout << "your height in meters is " << heightInMeters << "m \n" << endl;
cout << "your body mass index is "<< bMI << endl;

if ( bMI < 18.5)
cout<<"you are underweight\n\n";

if ( 18.5 <= bMI && bMI == 24.9)
cout << "your BMI is normal\n";

if (25 >= bMI && bMI == 29.9)
cout << "you are overweight\n";

if ( bMI >= 30 )
cout << "you are obese!!\n";

cout << "::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::" << endl;
cout << "DISCLAIMER: Though this calculator is accurate according to the bmi calculation,\but it dosen't put to consideration your body build which may vary the initial\ gotten result. \n";
cout << "&&&&&&&&:::::::::: APP BUILT BY DIKACHI :::::::::::::&&&&&&&&\n" << endl;
system("PAUSE";
return EXIT_SUCCESS;
}

//am stil a novice and am studying with the book, c++ how to program 8th edition. i just need corrections to why it is misbehaving

bro am a novice as well but this is the code in c language i hope it helps.
these are the mistakes i was able to see in your code.
1. An if ,else if statement is the best and for testing your conditions.
2.Then the statement should be in the format as shown in my code(i think)
3.float data type i think is the best cos u dealing with decimals here.
regards




#include<stdio.h>
#include<string.h>
#include<stdlib.h>

float multi(float a,float b) // function prototype
{
float heightsquare;

heightsquare=a*b;

return heightsquare;

}

int main(int argc, char *argv[])
{

float weightInKilograms, heightInMeters, bMI;
float heightsquare;
printf("::::::::::: FROM THE DEPARTMENT OF HEALTH AND HUMAN SERVICES. :::::::::::::\n\n";
printf(":::::::::::::: Body Mass Index (BMI) CALCULATOR. :::::::::::::::\n\n\n\n",

printf("enter your weight in kilograms:";
scanf("%f",&weightInKilograms);
printf("\n";

printf("enter your height in meters:";
scanf("%f",&heightInMeters);
printf("\n";

heightsquare= multi(heightInMeters,heightInMeters);// function call
bMI = weightInKilograms / heightsquare;

printf("your weight in Kg is %.1fkg\n",weightInKilograms);

printf("your height in meters is %.1fm\n",heightInMeters);
printf("your height in square meters is %.1f\n",heightsquare);

printf("your body mass index is %.1f\n",bMI);


// testing conditions with if then else if

if ( bMI < 18.5)
{
printf("you are underweight\n\n";
}

else if ( (bMI>=18.5) && (bMI <= 24.9))
{
printf("your BMI is normal\n";
}

else if ((bMI>=25) && (bMI <= 29.9))
{
printf("you are overweight\n";
}

else if ( bMI >= 30 )
{
printf("you are obese!!\n";
}
printf("::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::\n" );

printf("DISCLAIMER: Though this calculator is accurate according to the bmi calculation\n";

printf("but it dosen't put to consideration your body build which may vary the initial gotten result.\n";

printf("&&&&&&&&:::::::::: APP BUILT BY DIKACHI :::::::::::::&&&&&&&&\n";
getchar();
return 0;






}

Can program it for ya