Thread: Help with a code using File I/O and Loops

It seems as though I've written the code perfectly, although its not executing properly. I have to read a bunch of data from a file (which i named test.txt) and then execute a bunch of options to the user via a menu. heres the code.

Code:

#include <stdio.h>

int main(void)
{
    //initialize variables
    char fname[128];
    int size = 0;
    FILE* fin;
    int count = 0;
    int option;
    int low_bound;
    int high_bound;
    int x;
    double average = 0;
    int lowest = -1;
    int highest = 0;
    int target_donation;
    int target_count = 0;
    int target_donation2;
    int target_count2 = 0;
    int target_donation3;
    double percentage;
    int sum = 0;
    int total_under;
    int number[size];
    
    
    //Prompts user for the name of their data file to read.
    printf("Please enter the name of the data file\n");
    scanf("%s", fname);
    
    //Notice the "r". If it were a "w" it would be writing, not reading to the file
    fin = fopen(fname, "r");
    
   
    //This line scans the file that it is reading, and is reading the numbers within the file
    fscanf("%d ",&size);
    
    
    //This while loop accumulates the number of numbers within the file.
    while(!feof(fin))
        {
          fscanf(fin,"%d ", &number[count]);
          count++;
        }
    
    //Close the file
    fclose(fin);
    
    
    //Tells the user how many numbers were read within the file
    printf("The data for %d numbers of contributions has been read.\n", count);
    
    
    while(1==1)
        {
                
    
            //Now starts the menu process, asking the user for his/her choice
            printf("Please make a choice from the following options:\n");
    
            //Full menu
            printf("1. Calculate the average donation for a subset of the donations.\n");
            printf("2. Calculate the minimum donation for a subset of the donations.\n");
            printf("3. Calculate the maximum donation for a subset of the donations.\n");
            printf("4. Calculate the number of donations exceeding a target value.\n");
            printf("5. Calculate the number of donations of a particular dollar amount.\n");
            printf("6. Calculate what percentage of the donations (Value Wise) are under a target value.\n");
            printf("7. Quit\n");
    
    
            //Scanning the users option for the menu list
            scanf("%d", &option);
    
    
            //If the user chooses to quit, they will type 7, which the computer will read and return the program to quit
            if(option == 7)
                {
                    system("PAUSE");
                    return 0;
                }
    
    
            //I grouped options 1 to 3 because they all use the lower and higher bound variables.
            //I was going to individually write each option out, but grouping the 3 was easier.
            if((option >= 1)&&(option<=3))
            {
  
        
                printf("What is the low bound for your group(0-%d)?\n", size);
                scanf("%d", &low_bound);
         
                printf("What is the high bound for your group(0-%d)?\n", size);
                scanf("%d", &high_bound);
         
                if(option==1)
                {
                     for(x=low_bound; x<=high_bound; x++)
                        { 
                            average+=number[x];
                        }
             
                            average=average/size;
             
                   printf("The average donation from person %d to person %d is $%.2lf.\n", low_bound, high_bound, average);
                }
         
                if(option==2)
                {
                     for(x=low_bound; x<=high_bound; x++)
                     {
                        if(number[x]<lowest)
                        {
                             lowest=number[x];
                        }
                     }
                        printf("The smallest donation from person %d to person %d is $&d .\n", low_bound, high_bound, lowest);
                }
         
                if(option==3)
                {
                    for(x=low_bound; x<=high_bound; x++)
                    {
                        if(number[x]>highest)
                        {
                             highest=number[x];
                        }
                    }
                    
                    printf("The largest donation from person %d to person %d is $%d .\n", low_bound, high_bound, highest);
                }
            }
    
            //Now to compute if the user selects option 4
            //This time around, I chose to split up the 3 options that use the common variable of a target donation
            if(option==4)
            {
               printf("What is the target donation?\n");
               scanf("%d", &target_donation);
        
                for(x=lowest; x<highest; x++)
                {
                    if(target_donation>=number[x]) //consider revising
                    {
                        target_count++;
                    }
                }      
        
               printf("%d people donated more than %d .", target_count, target_donation);
            }
    
    
            //Now to compute if the user selects option 5
            if(option==5)
            {
                printf("What is the target donation?\n");
                scanf("%d", &target_donation2);
        
                for(x=lowest; x<=highest; x++)
                {
                    if(number[x]==target_donation2) //consider revising
                    {
                        target_count2++;
                    }
                }      
        
        
                printf("%d people donated exactly $%d .\n", target_count2, target_donation2);
        
            }
    
    
    
            //Now to compute if the user selects option 6
            if(option==6)
            {
                printf("What is the target donation?\n");
                scanf("%d", &target_donation3);
        
                for(x = 0; x < count; x++)
                {
                    sum += number[x];
                }
        
                for(x=lowest; x<=highest; x++)
                {
                    if(total_under < target_donation3)
                    {
                        total_under+= number[x];
                    }
                }
        
                   percentage = (sum/total_under) * 100;
        
                printf("Donations under $%d accounted for %.2lf percent of the funds raised",target_donation3, percentage);
            }
    
    }
    
    
    system("PAUSE");
    return 0;
}

So test.txt is a file with this written in it:

10
50
25
75
2000
30
500
800
10
25
485

where the output should be similar to this:

Please enter the name of the data file.
test.txt
The data for 10 number of contributions has been read.

Please make a choice from the following options:
1) Calculate the average donation for a subset of the donations.
2) Calculate the minimum donation for a subset of the donations.
3) Calculate the maximum donation for a subset of the donations.
4) Calculate the number of donations exceeding a target value.
5) Calculate the number of donations of a particular dollar amount.
6) Calculate what percentage of the donations (value wise) are under a target value.
7) Quit
1

What is the low bound for your group (0-9)?
3
What is the high bound for your group (0-9)?
6
The average donation from person 3 to person 6 is $832.50.

Please make a choice from the following options:
1) Calculate the average donation for a subset of the donations.
2) Calculate the minimum donation for a subset of the donations.
3) Calculate the maximum donation for a subset of the donations.
4) Calculate the number of donations exceeding a target value.
5) Calculate the number of donations of a particular dollar amount.
6) Calculate what percentage of the donations (value wise) are under a target value.
7) Quit
2

What is the low bound for your group (0-9)?
3
What is the high bound for your group (0-9)?
6
The smallest donation from person 3 to person 6 is $30.

Please make a choice from the following options:
1) Calculate the average donation for a subset of the donations.
2) Calculate the minimum donation for a subset of the donations.
3) Calculate the maximum donation for a subset of the donations.
4) Calculate the number of donations exceeding a target value.
5) Calculate the number of donations of a particular dollar amount.
6) Calculate what percentage of the donations (value wise) are under a target value.
7) Quit
3

What is the low bound for your group (0-9)?
3
What is the high bound for your group (0-9)?
6
The largest donation from person 3 to person 6 is $2000.

Please make a choice from the following options:
1) Calculate the average donation for a subset of the donations.
2) Calculate the minimum donation for a subset of the donations.
3) Calculate the maximum donation for a subset of the donations.
4) Calculate the number of donations exceeding a target value.
5) Calculate the number of donations of a particular dollar amount.
6) Calculate what percentage of the donations (value wise) are under a target value.
7) Quit
4

What is the target donation?
75
4 people donated more than $75.

Please make a choice from the following options:
1) Calculate the average donation for a subset of the donations.
2) Calculate the minimum donation for a subset of the donations.
3) Calculate the maximum donation for a subset of the donations.
4) Calculate the number of donations exceeding a target value.
5) Calculate the number of donations of a particular dollar amount.
6) Calculate what percentage of the donations (value wise) are under a target value.
7) Quit
5

What is the target donation?
25
2 people donated exactly $25.

Please make a choice from the following options:
1) Calculate the average donation for a subset of the donations.
2) Calculate the minimum donation for a subset of the donations.
3) Calculate the maximum donation for a subset of the donations.
4) Calculate the number of donations exceeding a target value.
5) Calculate the number of donations of a particular dollar amount.
6) Calculate what percentage of the donations (value wise) are under a target value.
7) Quit
6

What is the target donation?
500
Donations under $500 accounted for 17.50 percent of the total funds raised.

Can anyone help me as to why the file isn't executing properly? Thanks in advance.