the question that i have to solve says:

fuction floor can be used to round a number to a specific decimal place. the statement y=floor(x*10+0.5)/10; rounds x to the tenths position. write a program that defines four functions to round a number x in various ways:

1- roundToInteger(number)

2- roundToTenths(number)

3-roundToHundredths(number)

4- roundToThousandths(number)

for each value read, your program should print the original value, the number rounded to nearest tenths,hundredths,thousandths.

this is what i have tried to write..but ofcourse..and like usual..lol..i have lots of mistakes..i would really appreciate the help..

#include<iostream> using std::cout; using std::cin; using std::endl; # include<cmath> //declaration of functions void roundToInteger(double); void roundToTenths(double); void roundToHundredths(double); void roundToThousandths(double); int main() { unsigned short choice; do { float x; cout<<”-1- round decimal to the nearest integer”<<endl; cout<<”-2- round decimal to the nearest tenth”<<endl; cout<<”-3- round decimal to the nearest hundredth”<<endl; cout<<”-4- round decimal to the nearest thousandth”<<endl; cout<<”please enter a decimal”<<endl; cin>>x; cout <<"You chose Menu Option #"<<choice<<endl; } while(selection<1 || selection>4); switch(choice) { case 1 : roundToInteger(number); break; case 2 : roundToTenths(number); break; case 3 : roundToHundredths(number); break; case 4: roundToThousandths(number); break; default: cout<<”you should never get here\a\a\a\a!!!”; } }while(choice != 5); cout<<”you choose to quit\a\a\a"<<endl; return 0; } //definition of functions void roundToInteger(double number) { y= floor(x+0.5); cout<<”the decimal ”<<x<<” rounded to the nearest integer = “<<number<<endl; } void roundToTenths( double number) { y=floor(x*10+0.5)/10; cout<<”the decimal ”<<x<<” rounded to the nearest tenths = “<<number<<endl; } void roundToHundredths(double number) { y=floor(x*100+0.5)/100; cout<<”the decimal ”<<x<<” rounded to the nearest hundredths = “<<number<<endl; } void roundToThousandths(double number) { y=floor(x*1000+0.5)/1000; cout<<”the decimal ”<<x<<” rounded to the nearest thousandths = “<<number<<endl; }