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POSimple C++ Error: "... undeclared (first use this function)"
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copied!<p>Hey guys, I am working on my first C++ program for school. For some reason I am getting the following error when I try to compile it:</p> <pre><code>`truncate' undeclared (first use this function) </code></pre> <p>Full Source:</p> <pre><code>#include <iostream> #include <math.h> using namespace std; #define CENTIMETERS_IN_INCH 2.54 #define POUNDS_IN_KILOGRAM 2.2 int main() { double feet, inches, centimeters, weight_in_kg, weight_in_lbs; // get height in feet and inches cout << "Enter height (feet): "; cin >> feet; cout << "Enter (inches): "; cin >> inches; // convert feet and inches into centimeters centimeters = ((12 * feet) + inches) * CENTIMETERS_IN_INCH; // round 2 decimal places and truncate centimeters = truncate(centimeters); printf("Someone that is %g' %g\" would be %g cm tall", feet, inches, centimeters); // weights for bmi of 18.5 weight_in_kg = truncate(18.5 * centimeters); weight_in_lbs = round(weight_in_kg * POUNDS_IN_KILOGRAM); printf("18.5 BMI would correspond to about %g kg or %g lbs", weight_in_kg, weight_in_lbs); // weights for bmi of 25 weight_in_kg = truncate(25 * centimeters); weight_in_lbs = round(weight_in_kg * POUNDS_IN_KILOGRAM); printf("25.0 BMI would correspond to about %g kg or %g lbs", weight_in_kg, weight_in_lbs); // pause output cin >> feet; return 0; } // round result double round(double d) { return floor(d + 0.5); } // round and truncate to 1 decimal place double truncate(double d) { return round(double * 10) / 10; } </code></pre> <p>Any help would be appreciated. Thanks.</p>

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