What's error of my code?

like amost all languages: if (low <= bmi && bmi < high) == equals != different < lower than <= lower or equals > greater than >= greater or equals && logical AND || logical OR

What are the errors you are getting from it?

about int and double

what are you meaning by using % operator, so?

Arash the error says that you're trying to get remainder of integer division (% operator) with a decimal (double) as right operand (divisor)... maybe you're trying to get 17.9 percent of rand()? if so, you must do: rand()*17.9/100 ... and add 12, obviously: double hlr = rand()*17.9/100+12; edit: similar for hwr ;)

No, I want to find a random number between the two number

so, first you doesn't need random values, nor hlr and hwr... you just need to test if bmi is greater (or equal) than lowest boundary AND lowest than higest boundary ;)

With your solution, the errors disappear but the "if" command is no longer executed

what do you think doing with % initially? and what are you trying to achieve? as 'if' blocks have quite no chance to be executed, even if you provide the good calculation to get a decimal random value between two bounds ^^

What about "switch"?

what about explaining your purpose?

I named the variable under bmi in the code and now I want it to print a message if the value is between the two selected numbers

How?

You did type double value of int function. For Example: Int x = 28 double y = 17.9

Tanks a lot

#include <iostream> #inlcude <stdlib.h> #include <time.h> using namespace std; Int main() { double weight; cout << "Weight : "; cin >> weight; cout << endl; double height; cout << " Height "; cin >> height; cout << endl; double heightpow2 ; heightpow2 = height*height; cout << endl; double bmi ; bmi = weight/heightpow2; cout << "Bmi " << bmi << endl; double hlr; hlr = rand() % 17.9+12; If(bmi==hlr) { cout << "Weight loss range"; } double hwr; hwr = rand()%24+18; If(bmi==hwr) { cout << "Helthy weight range"; } system(" pause") return 0; } &&&&&: If it c++ : Do u include - <ctime>?? #include <ctime> "for rand" And Why u dont add : srand(0(time)) ?

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