Thread: Writing Struct to Binary File as a Save to Disk Operation

I've got a statistics management system that uses arrays of structures and I want to be able to close the program and reopen it without losing any data. My idea was to write all of the information to a binary file and then read it out of there each time the program is reopened.

Ive got an array of 5 structures with an array of structs within each of them. This may complicate things...... I can't figure out how to make it work. Any suggestions????????

Code:

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

#pragma warning (disable: 4995)
#pragma warning (disable: 4996)

FILE *out;
#define NUMUSERS 5

typedef struct rnd
{
	char   club[40];
	double slope;
	int    par;
	int    score;
	int    putts;
	int    fwyHit;
	int    grnHit;
	int    sandSave;
	int    numThrees;
	int    sandAttmpt;
	double rndHcp;
}  ROUND;

struct golfertype
{
	char   name[40];
	double handicap;
	int    totRounds;
	char   homeClub[40];
	double avgPutts;
	double avgFwys;
	double avgGreens;
	double sandSaves;
	int    sandRounds;
	ROUND  rnd[100];
};


void PrintVitals(struct golfertype *pt);
void EnterScore (struct golfertype *pt);
void ViewLast10(struct golfertype *pt);
void PrintLast10(struct golfertype *pt);


void main()
{
	int choice;
	char choice1;
	int choice2;
	char choice3;
	struct golfertype *golfer;// golfer1, golfer2, golfer3, golfer4, golfer5;
	ROUND rnd;
	int i;
	int a;
	int j;
	int numusers;
	size_t size;
	struct golfertype *pointer;
	FILE *save;

	save = fopen("save.dat","ab");
	fread(&golfer, sizeof(*golfer), 1, save);
	fclose(save);
	
	numusers = 5;
	golfer   = NULL;

    size     = numusers *  sizeof(golfertype);
	golfer = (golfertype *) realloc(golfer,size);

	strcpy( golfer[0].name, "Andrew Holtz" );
	golfer[0].avgFwys = 0;
	golfer[0].avgGreens = 0;
	golfer[0].avgPutts = 0;
	golfer[0].handicap = 0;
	strcpy( golfer[0].homeClub, "Pitt Meadows Golf Club" );
	golfer[0].sandRounds = 0;
	golfer[0].sandSaves = 0;
	golfer[0].totRounds = 0;

	strcpy( golfer[1].name, "Dan Thomson" );
	golfer[1].avgFwys = 0;
	golfer[1].avgGreens = 0;
	golfer[1].avgPutts = 0;
	golfer[1].handicap = 0;
	strcpy( golfer[1].homeClub, "Pitt Meadows Golf Club" );
	golfer[1].sandRounds = 0;
	golfer[1].sandSaves = 0;
	golfer[1].totRounds = 0;

	strcpy( golfer[2].name, "Terry Salchenberger" );
	golfer[2].avgFwys = 0;
	golfer[2].avgGreens = 0;
	golfer[2].avgPutts = 0;
	golfer[2].handicap = 0;
	strcpy( golfer[2].homeClub, "Pitt Meadows Golf Club" );
	golfer[2].sandRounds = 0;
	golfer[2].sandSaves = 0;
	golfer[2].totRounds = 0;

	strcpy( golfer[3].name, "Dustin Vernon" );
	golfer[3].avgFwys = 0;
	golfer[3].avgGreens = 0;
	golfer[3].avgPutts = 0;
	golfer[3].handicap = 0;
	strcpy( golfer[3].homeClub, "Pitt Meadows Golf Club" );
	golfer[3].sandRounds = 0;
	golfer[3].sandSaves = 0;
	golfer[3].totRounds = 0;

	strcpy( golfer[4].name, "Jesse Kurucz" );
	golfer[4].avgFwys = 0;
	golfer[4].avgGreens = 0;
	golfer[4].avgPutts = 0;
	golfer[4].handicap = 0;
	strcpy( golfer[4].homeClub, "Pitt Meadows Golf Club" );
	golfer[4].sandRounds = 0;
	golfer[4].sandSaves = 0;
	golfer[4].totRounds = 0;
	
	
	printf("\n[1] AndrewH");
	printf("\n[2] DanT");
	printf("\n[3] TerryS");
	printf("\n[4] DustinV");
	printf("\n[5] JesseK");

	printf("\nPlease choose you name/profile from the list: ");
	scanf("%d", &choice);

	switch(choice)
	{
		case 1:
			i=0;
			pointer = &golfer[i];
			break;

		case 2:
			i=1;
			pointer = &golfer[i];
			break;

		case 3:
			i=2;
			pointer = &golfer[i];
			break;

		case 4:
			i=3;
			pointer = &golfer[i];
			break;

		case 5:
			i=4;
			pointer = &golfer[i];
			break;

	}

	fflush(stdin);

	PrintVitals( pointer );

	printf("\n\n\nTo view a menu press [M], to exit press [E]");
		scanf("%c", &choice1);
	
	if (choice1 == 'e' || choice1 == 'E')
	{
		save = fopen("save.dat", "ab");
		fwrite(&golfer, sizeof(*golfer), 1, save);
		fclose(save);
		exit(1);
	}
		
	else if (choice1 == 'm' || choice1 == 'M')
	{
	while (1)
		{
		
		printf("\n\n[1] Enter a score");
		printf("\n[2] View last 10 rnds");
		printf("\n[3] Print out the last 10 scores");
		printf("\n[4] View updated statistics");
		printf("\n[5] Exit the program");

		printf("\nPlease make a choice from the list: ");
		scanf("%d", &choice2);
		
		fflush(stdin);
		
	if (choice2 == 1)
	{
		EnterScore( pointer );
	}
	
	else if(choice2 == 2)
	
		ViewLast10(pointer);
		
	else if(choice2 == 3)
	{
		PrintLast10( pointer );
	}
	else if(choice2 == 4)
	{
		PrintVitals ( pointer );
	}

	else if (choice2 == 5)
	{
		save = fopen("save.dat", "ab");
		fwrite(&golfer, sizeof(*golfer), 1, save);
		fclose(save);
		exit(1);
	}
	}

	}
}




void EnterScore (struct golfertype *pt)
{
	int i;
	char choice3;
	
		if (pt->totRounds == 0)
			i = (pt->totRounds);
		if (pt->totRounds > 0)
			i = (pt->totRounds)-1;
	
		printf("Please enter the name of the golf club: ");
		gets( (pt->rnd[i]).club );

		fflush(stdin);
		printf("\nPlease enter the slope of the course: ");
		scanf("%lf", &(pt->rnd[i]).slope );

		fflush(stdin);
		printf("\nPlease enter the par of the course: ");
		scanf("%d", &(pt->rnd[i]).par);

		fflush(stdin);
		printf("\nPlease enter the number of par 3's the course has: ");
		scanf("%d", &(pt->rnd[i]).numThrees);

		fflush(stdin);
		printf("\nPlease enter your score: ");
		scanf("%d", &(pt->rnd[i]).score);
		
		fflush(stdin);
		printf("\nPlease enter the number of putts you had: ");
		scanf("%d", &(pt->rnd[i]).putts);

		fflush(stdin);
		printf("\nPlease enter the number of fairways that you hit: ");
		scanf("%d", &(pt->rnd[i]).fwyHit);

		fflush(stdin);
		printf("\nPlease enter the number of greens that you hit: ");
		scanf("%d", &(pt->rnd[i]).grnHit);

		fflush(stdin);
		printf("\nWere you in any green side traps today?(Y/N) ");
			scanf("%c", &choice3);

		if (choice3 == 'y' || choice3 == 'Y')
		{
			fflush(stdin);
			printf("\nPlease enter the sand saves you had: ");
			scanf("%d", &(pt->rnd[i]).sandSave);

			fflush(stdin);
			printf("\nPlease enter the number of sand traps you were in: ");
			scanf("%d" , &(pt->rnd[i]).sandAttmpt);


			pt->sandRounds++;
			pt->sandSaves = ((double)(pt->sandSaves) + ((double)(pt->rnd[i]).sandSave / (double)(pt->rnd[i]).sandAttmpt)) / (double)(pt->sandRounds) * 100;

		}

		pt->totRounds++;
		pt->rnd[i].rndHcp = (pt->rnd[i]).score - (pt->rnd[i]).slope;
		pt->handicap += (pt->rnd[i]).rndHcp/((double)pt->totRounds);
		pt->avgPutts  = ((pt->avgPutts) + (double)(pt->rnd[i].putts))/((double)pt->totRounds);
		pt->avgFwys   = ((pt->avgFwys) + ((double)(pt->rnd[i]).fwyHit / (double)(18 - (pt->rnd[i]).numThrees))) / ((double)pt->totRounds) * 100;
		pt->avgGreens = (((pt->avgGreens) + ((double)(pt->rnd[i]).grnHit/18)) / ((double)pt->totRounds)) * 100;
}

void PrintVitals(struct golfertype *pt)
{
	printf("\n%s", pt->name);
	printf("\nHomeClub: %s", pt->homeClub);
	printf("\nHandicap: %.2lf", pt->handicap);
	printf("\nRounds Played: %d", pt->totRounds);
	printf("\nAverage Putts: %.2lf", pt->avgPutts);
	printf("\nPercent Average Fairways: %.2lf ", pt->avgFwys);
	printf("\nPercent Average Greens: %.2lf  ", pt->avgGreens);
	printf("\nPercentage Sand Saves: %.2lf  ", pt->sandSaves);
}

void ViewLast10 (struct golfertype *pt)
{
	int i,j;

	if (pt->totRounds > 10)
	{
		i = pt->totRounds - 1;

		for(j=0;j<10;j++)
		{
			printf("\nClub: %s",(pt->rnd[i]).club);
			printf("\nSlope: %.2lf",(pt->rnd[i]).slope);
			printf("\nPar: %d",(pt->rnd[i]).par);
			printf("\nScore: %d",(pt->rnd[i]).score);
			printf("\nPutts: %d",(pt->rnd[i]).putts);
			printf("\nFairways Hit: %d",(pt->rnd[i]).fwyHit);
			printf("\nGreens Hit: %d",(pt->rnd[i]).grnHit);
			printf("\nSand Saves: %d",(pt->rnd[i]).sandSave);
			printf("\nSand Attempts: %d",(pt->rnd[i]).sandAttmpt);

			i--;
		}
	}

		if (pt->totRounds < 10)
		{
			i = pt->totRounds - 1;

			while (i > -1)
			{
				printf("\nClub: %s",(pt->rnd[i]).club);
				printf("\nSlope: %.2lf",(pt->rnd[i]).slope);
				printf("\nPar: %d",(pt->rnd[i]).par);
				printf("\nScore: %d",(pt->rnd[i]).score);
				printf("\nPutts: %d",(pt->rnd[i]).putts);
				printf("\nFairways Hit: %d",(pt->rnd[i]).fwyHit);
				printf("\nGreens Hit: %d",(pt->rnd[i]).grnHit);
				printf("\nSand Saves: %d",(pt->rnd[i]).sandSave);
				printf("\nSand Attempts: %d",(pt->rnd[i]).sandAttmpt);

			i--;
			}
		}
	}
	
void PrintLast10(struct golfertype *pt)
{
	int i,j;
	
	i = pt->totRounds - 1;
		
	if (pt->totRounds > 10)
	{
		out = fopen("last10.txt", "w");

		for(j=0;j<10;j++)
		{
			fprintf(out, "\n Club: %s",pt->rnd[i-9].club);
			fprintf(out, "\n Slope: %.2lf",pt->rnd[i-9].slope);
			fprintf(out, "\n Par: %d",pt->rnd[i-9].par);
			fprintf(out, "\n Score: %d",pt->rnd[i-9].score);
			fprintf(out, "\n Putts: %d",pt->rnd[i-9].putts);
			fprintf(out, "\n Fairways Hit: %d",pt->rnd[i-9].fwyHit);
			fprintf(out, "\n Greens Hit: %d",pt->rnd[i-9].grnHit);
			fprintf(out, "\n Sand Saves: %d",pt->rnd[i-9].sandSave);
			fprintf(out, "\n Sand Attempts: %d",pt->rnd[i-9].sandAttmpt);
			i++;
		}
		fclose(out);
	}
	
	if (pt->totRounds < 10)
	{
		out = fopen("last10.txt", "w");
		
		while (i > -1)
		{
				fprintf(out, "\nClub: %s",pt->rnd[i].club);
				fprintf(out, "\nSlope: %.2lf",pt->rnd[i].slope);
				fprintf(out, "\nPar: %d",pt->rnd[i].par);
				fprintf(out, "\nScore: %d",pt->rnd[i].score);
				fprintf(out, "\nPutts: %d",pt->rnd[i].putts);
				fprintf(out, "\nFairways Hit: %d",pt->rnd[i].fwyHit);
				fprintf(out, "\nGreens Hit: %d",pt->rnd[i].grnHit);
				fprintf(out, "\nSand Saves: %d",pt->rnd[i].sandSave);
				fprintf(out, "\nSand Attempts: %d",pt->rnd[i].sandAttmpt);
				i--;
			}
			fclose(out);
		}
	}