C++ Program

[wonkaman]

I have the following source code and for some reason I don't know how to use both in the same program. I know there is a void somewhere. Also I am having trouble outputting the data into a table, if I could get some help with that. Basically to where it reads Days on the left side and Number of Organisms on the right side (for up to 20 days).


#include <iostream>
using namespace std;

int main(){
int sum = 0
int input;
int i = 0;

cout << "Please enter a number: ";
cin >> input;

while(i<=input){
sum = sum + i;
i++;
}//end while loop

cout << endl << "The sum is: " << sum << endl;

return 0
}//end main function
//end program

#include <iostream>
using namespace std;

int main(){
int organisms;
double reproduceRate;
int days;

cout << "What is the initial number of organisms: ";
cin >> organisms;
if(organisms < 2){
cout << "Invalid, try again." << endl;
cout << "What is the initial number of organisms: ";
cin >> organisms;
}

cout << endl << "What is their reproduce rate as a percentage: %";
cin >> reproduceRate;
if(reproduceRate < 0){
cout << "Invalid, try again." << endl;
cout << endl << "What is their reproduce rate as a percentage: %";
cin >> reproduceRate;
}

cout << endl << "How many days: ";
cin >> days;
if(days < 1){
cout << "Invalid, try again." << endl;
cout << endl << "How many days: ";
cin >> days;
}

for(int i=0; i<days; i++){
organisms = ((1+(reproduceRate/100.0)) * organisms) + 0.5;
}//end for loop

cout << endl << "The number of organisms after " << days << " days is " << organisms << endl;

return 0;
}//end main function
//end program

[Poke386]

A program can have only 1 main() function (as far as I know). You could possibly split them into two separate functions and run any one depending on the user's choice though.

[Umz]

Its hard to understand what your trying to do, if you need both calculations in a single program just take the first code and copy it into the second program as a function then call the function if needed.

Your first program seems independant of the second one.