Thread: Help printing elements of array

Hey everyone! I want to print the contents of 2 arrays using a function, and in a specific format. I only want to print specific contents of either array, based off of input from the user. My code works perfectly, compiles under gdb, and provides valid output. I just need help with the last function. I want to display information like

ID TYPE GROSS DISCOUNT NET
499230076 1 13500.000 5698.000 7802.000
298760112 2 12000.000 8529.000 3471.000
592493811 3 10800.000 9899.000 901.000
355982306 3 7200.000 10000.000 -2800.000
------------------------------------------------


TOTAL 43500.000 34126.000 9374.000

The function is at the very bottom. I also call this function last in main.

Here's my code!

Code:

#include<stdio.h>
/* ASrray definitions*/
#define STU_ROWSIZE 6
#define STU_COLSIZE 2
#define BILL_ROWSIZE 6
#define BILL_COLSIZE 3


/*Function prototypes*/
int checkID(int stuInfo[][STU_COLSIZE], int idEntered);
void processUndergrad(double billInfo[][BILL_COLSIZE], int id, int rowNumber);
void processGraduate(double billInfo[][BILL_COLSIZE], int id, int rowNumber);
void processPhD(double billInfo[][BILL_COLSIZE], int id, int rowNumber);
int checkHours(int hours, int type);
void processFinalReport(int stuInfo[][STU_COLSIZE], double billInfo[][BILL_COLSIZE]);


int main(void)
{
    /* The Student info Array*/
    int stuInfo[STU_ROWSIZE][STU_COLSIZE]={   {394003920, 2},
                                      {388920394, 3},
                                      {499230076, 1},
                                      {298760112, 2},
                                      {592493811, 3},
                                      {355982306, 3}   };
    
    /* The Billing info array*/
    double billInfo[BILL_ROWSIZE][BILL_COLSIZE]={   {0.0, 0.0, 0.0},
                                            {0.0, 0.0, 0.0},
                                            {0.0, 0.0, 0.0},
                                            {0.0, 0.0, 0.0},
                                            {0.0, 0.0, 0.0},
                                            {0.0, 0.0, 0.0}   }; 
    int idEntered, type, id, rowNumber, tuition;
    /* Variable to exit the program */
    int exit=1;
    /* program repetition controller*/
    while(exit==1)
    {
        printf("Enter the student ID. \n");
        scanf("%d", &idEntered);
        while(checkID(stuInfo, idEntered)== -1)
        {
            printf("Invalid student ID.  Please try again. \n");
            scanf("%d", &idEntered);
        }
        int rowID=checkID(stuInfo, idEntered);
                switch(stuInfo[rowID][1])
        {
            case 1: 
                processUndergrad(billInfo,idEntered,rowID);
                break;
            case 2: 
                processGraduate(billInfo,idEntered,rowID);
                break;
            case 3: 
                processPhD(billInfo, idEntered,rowID);
                break;
        }
        /*Prompt user to exit program*/
        printf("\nDo you want to continue to the next student? If yes enter 1, else enter 0. \n");
        scanf("%d", &exit);
        processFinalReport(stuInfo, billInfo);
    }
    return 0;


}


int checkID(int stuInfo[STU_ROWSIZE][STU_COLSIZE], int idEntered)
{
    int i=0,j=0;
    for(i=0;i<STU_ROWSIZE;i++)
    {
        for(j=0;j<STU_COLSIZE;j++)
        {
            if(stuInfo[i][j]==idEntered)
            {
                return i;
            }
        }
    }
    return -1;
}


void processUndergrad(double billInfo[BILL_ROWSIZE][BILL_COLSIZE],int idEntered, int rowID)
{
    int hours;
    printf("Enter the number of credit hours \n");
        scanf("%d", &hours);
        while(checkHours(hours, rowID)==0)
        {
            printf("Undergrad students must be enrolled in 3-18 hours. \n");
                scanf("%d", &hours);
        }
        int tuition=hours*750;
    int scholarshipCompare=tuition*.50;
    int scholarship;
    printf("Enter scholarship amount \n");
    scanf("%d", &scholarship);
    while(scholarship>scholarshipCompare)
    {
        printf("Scholarship can't be greater than 50%% of the tuition. Enter again. \n");
        scanf("%d", &scholarship);
    }
    int finalTuition=tuition-scholarship;
    billInfo[rowID][0]=tuition;
    billInfo[rowID][1]=scholarship;
    billInfo[rowID][2]=finalTuition;
    printf("Undergrad student %d tuition is : \n", idEntered);
    printf("Gross                     $ %.2lf\n", billInfo[rowID][0]);
    printf("Scholarship Amount        $ %.2lf\n", billInfo[rowID][1]);
    printf("Total Tuition Bill        $ %.2lf\n", billInfo[rowID][2]);
}
void processGraduate(double billInfo[BILL_ROWSIZE][BILL_COLSIZE], int idEntered, int rowID)
{    
    int hours;
    printf("Enter the number of credit hours \n");
        scanf("%d", &hours);
        while(checkHours(hours, rowID)==0)
        {
            printf("Graduate students must be enrolled in 3-12 hours. \n");
                scanf("%d", &hours);
        }
        int tuition=hours*1000;
    int scholarshipCompare=tuition*.75;
        int scholarship;
        printf("Enter scholarship amount \n");
        scanf("%d", &scholarship);
        while(scholarship>scholarshipCompare)
        {
                printf("Scholarship can't be greater than 75%% of the tuition. Enter again. \n");
                scanf("%d", &scholarship);
        }
        int finalTuition=tuition-scholarship;
        billInfo[rowID][0]=tuition;
        billInfo[rowID][1]=scholarship;
        billInfo[rowID][2]=finalTuition;
        printf("\nGraduate student %d tuition is : \n", idEntered);
        printf("Gross                     $ %.2lf\n", billInfo[rowID][0]);
        printf("Scholarship Amount        $ %.2lf\n", billInfo[rowID][1]);
        printf("Total Tuition Bill        $ %.2lf\n", billInfo[rowID][2]);


}
void processPhD(double billInfo[BILL_ROWSIZE][BILL_COLSIZE], int idEntered, int rowID)
{
    int hours;
    printf("Enter the number of credit hours \n");
        scanf("%d", &hours);
        while(checkHours(hours, rowID)==0)
        {
            printf("PhD students must be enrolled in 3-9 hours. \n");
                scanf("%d", &hours);
        }
        int tuition=hours*1200;
    int stipendCompare=10000;
        int stipend;
        printf("Enter stipend amount \n");
        scanf("%d", &stipend);
        while(stipend<1 ||stipend>10000)
        {
                printf("Scholarship can't be greater than 10,000. Enter again. \n");
                scanf("%d", &stipend);
        }
        int finalTuition=tuition-stipend;
        billInfo[rowID][0]=tuition;
        billInfo[rowID][1]=stipend;
        billInfo[rowID][2]=finalTuition;
        printf("Undergrad student %d tuition is : \n", idEntered);
        printf("Gross                     $ %.2lf\n", billInfo[rowID][0]);
        printf("Stipend                   $ %.2lf\n", billInfo[rowID][1]);
        printf("Total Tuition Bill        $ %.2lf\n", billInfo[rowID][2]);


}
int checkHours(int hours, int type)
{
    switch(type)
    {
        case 1: 
            if(hours<3 || hours>18)
            {
                return 0;
            }
            else
            {
                return 1;
            }
            break;
        case 2: 
            if(hours<3 || hours>12)
            {
                return 0;
            }
            else
            {
                return 1;
            }
            break;
        case 3: 
            if(hours<3 || hours>9)
            {
                return 0;
            }
            else
            {
                return 1;
            }
            break;
    }
}
void processFinalReport(int stuInfo[STU_ROWSIZE][STU_COLSIZE], double billInfo[BILL_ROWSIZE][BILL_COLSIZE])
{
    printf("STUDENT BILLING REPORT \n\n\n\n");
    printf("   ID        TYPE          GROSS          DISCOUNT          NET\n");
    printf
}

I'm aware you can print the contents of an array with a for loop, but in this scenario I don't feel that would help. The function only lists either array as accessible arguments. Therefore, within the function, I don't believe I can call variables like idEntered or rowID to print the contents I want. Moreso, if no information was entered for, say, student #499230076, I wouldn't want to print it. Similarly, if a student's tuition is less than 0, I wouldn't want to print it.

Originally Posted by laserlight

What is processFinalReport supposed to print? Be precise, e.g., say "print the billing information for the student with the student ID entered by the user", not "print the contents of 2 arrays using a function, and in a specific format".

I believe if you look at my original post, it specifies what I want the function processFinalReport to print. It should print every instance that a student ID was entered, followed by the student type, total tuition, scholarship amount, and then the amount after tuition minus the scholarship. At the bottom it prints totals for the categories. This format should clearly dictate what I want printed

ID TYPE GROSS DISCOUNT NET
499230076 1 13500.000 5698.000 7802.000
298760112 2 12000.000 8529.000 3471.000
592493811 3 10800.000 9899.000 901.000
355982306 3 7200.000 10000.000 -2800.000
------------------------------------------------


TOTAL 43500.000 34126.000 9374.000

Originally Posted by laserlight

No, you only provided example output. That is a Good Thing, but lacked an explanation of what the output is about.

Oh okay, that makes sense.

Originally Posted by laserlight

Ah. This means that you need to record the student IDs that were entered, e.g., in an array, and also pass this array to the function. This way, you can then loop over the student IDs and obtain the information to be printed. However, I noticed that you call processFinalReport at the bottom of the main loop. Perhaps this should be called after the loop, i.e., after all the student IDs have been entered?

By the way, avoid naming your variable exit as there is a function from <stdlib.h> named exit.

I'll change the variable exit name to prgQuit or something like that, thank you. I can't modify any of the functions, so there has to be a way to do it without creating a 3rd array

Originally Posted by laserlight

I see. In that case, a simple solution exists: create another array that is a copy of stuInfo such that it only contains student information for the given student IDs, then pass this array as the first argument. This is inefficient, but it will satisfy the constraints. One problem is that you cannot use STU_ROWSIZE, but this can be worked around with say, an extra row with say, a specially designated invalid student ID serving as the sentinel value (like how a null character serves to mark the end of a string).

That makes perfect sense. Thank you very much.