Undeclared identifiers?

Not sure why I'm getting the undeclared identifier and identifier is undefined for "selection." Can anyone see the problem?

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#include <iostream>
#include <fstream>

void mainMenu(int);
void displayChart();

int main() {

	mainMenu(selection);
	displayChart();

	system("pause");
}

void mainMenu(int selection) {
//................
}
Last edited on
You don't have a variable int selection in your main
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