at the beginning of main when i declare all of those ints like "int choice" I right clicked them and selected find implementation/declaration and it says choice is not found, along with all the others.



Code:
/*---------------------------------------------------------------
 * Programmer: Charles Cunningham
  * Date: 2/5/2012
 * Name: Hw#1
 * Description: This program generates addition or subtraction problems
 based on the users choice. Then the user must guess the correct answer. If correct the user gets a point added to his score
 ---------------------------------------------------------------*/

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <math.h>





int menu();
void addition(int *Preward); // function to return truth values
void subtraction(int *Preward);

int main()
{
    int Finished = 0;
    int choice, score = 0;
    int reward = 0;

    while(Finished != 1); // while finished is not true
    {
        printf("\nscore: %d", score); // print the score
        {
            choice = menu(); // calls for user input and enters it to switch
            switch  (choice){ // accesses the functions
            case 0: Finished = 1;                     break;
            case 1: addition(&reward);                break;
            case 2: subtraction(&reward);             break;
            default : printf("Error in input\n\n");   break;
            }
            if(reward == 1){
                score += reward; // score = score + reward
            }
        }
    }
    return 0;
}

int menu() //main menu that gets called and allows fr user input
{
    int MenuChoice;
    printf("\n");
    printf("Enter 1 for addition\n");
    printf("Enter 2 for Subtraction\n");
    printf("Enter 0 to quit\n");
    printf("-----------------\n");
    printf("Choice: ");
    scanf("%d", &MenuChoice); // user input
    return MenuChoice; //return the choice to choice to select a case
}

void addition(int *Preward) //function that is called by the users selection
{
    int answer;
    int random1, random2;
    srand(time(NULL)); //generates fresh numbers each time.
    random1 = 1+(rand()%99); // from 1-99
    random2 = 1+(rand()%99); // from 1-99

    printf("\n%d - %d = ", random1, random2); //code to format the random math problem
    scanf("%d", &answer); // user input of answer
    {
        if (answer == (random1+random2)){
            printf("Congratulations\n\n");
            *Preward = 1;// tellsesult whether to add a pt or not
        }   //if user is correct than the score is incremented
        else{
            printf("Incorrect\n\n");} //if not than the score is not incremented

    }
}

void subtraction(int *Preward) // follows same model as previous function, but instead subtraction.
{
    int answer;
    int random1, random2;

    srand(time(NULL));

    random1 = 1+(rand()%99); // from 1-99
    random2 = 1+(rand()%99); // from 1-99

    printf("\n%d - %d = ", random1, random2);
    scanf("%d", &answer);

    if (answer == (random1-random2)){
        printf("Congratulations\n\n");
        *Preward = 1;// tells result whether to add a pt or not
    }
    else{
        printf("Incorrect\n\n");
    }

}