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

typedef struct
{
	char item[50];
	int date[15];
	float price[5];
	int amount[10];
	float total[10];
}EXPENSES;

EXPENSES aExpenses;

int getOption();
void input();
void viewAll();
void del();
void edit();

int main (void)
{
	int done = 0;
	int option;
	
	//while (!done)
		option = getOption();

	if (option == 5)
		done = 1;

	else
	{
		switch (option)
		{
		case 1: input;
			break;
		case 2: viewAll;
			break;
		case 4: del;
			break;
		case 5: edit;
			break;

		default : printf("Invalid selection");
		}
	}
	return 0;
}
int getOption()
{
	int option;
	
	printf("\t====*MAIN MENU*====\n");
	printf("\t1) Enter New data\n");
	printf("\t2) View all data\n");
	printf("\t3) Edit data\n");
	printf("\t4) delete data\n");
	printf("\t5) exit\n\n");

	printf("enter your option: ");
	scanf("d",&option);

	return option;
}

void input(void)
{
	char item;
	int date;
	float price;
	int amount;
	float total;
	FILE* p;

	p = fopen ("data.txt", "w");
	fprintf(p,"%c\n", item);
	fprintf(p,"%d\n", date);
	fprintf(p,"%f\n", price);
	fprintf(p,"%d\n", amount);
	fprintf(p,"%f\n", total);
	fclose(p);
	
	return;
}
void viewAll()
{
	char item;
	int date;
	float price;
	int amount;
	float total;
	FILE* p;
	
	p = fopen ("data.txt", "r");
	fscanf(p,"%c %d %f %d %f", &item, &date, &price, &amount, &total);
	fclose(p);

	return;
}
void del()
{
	char item;
	int date;
	float price;
	int amount;
	float total;
	FILE* p;

	p = fopen ("data.txt", "a");
	fprintf(p,"%c\n", item);
	fprintf(p,"%d\n", date);
	fprintf(p,"%f\n", price);
	fprintf(p,"%d\n", amount);
	fprintf(p,"%f\n", total);
	fclose(p);

	return;
}
void edit()
{
	char item;
	int date;
	float price;
	int amount;
	float total;
	FILE* p;

	p = fopen ("data.txt", "w");
	fprintf(p,"%c\n", item);
	fprintf(p,"%d\n", date);
	fprintf(p,"%f\n", price);
	fprintf(p,"%d\n", amount);
	fprintf(p,"%f\n", total);
	fclose(p);
	
	return;
}

this program can run but when i execute it, it gives me the wrong output

You need to explain exactly what you mean by wrong output and show us what your file data.txt looks like.

Consider using a compiler with more warnings enabled.

gcc -W -Wall -ansi -pedantic -O2 foo.c
foo.c: In function `main':
foo.c:26: error: parse error before '/' token
foo.c: In function `getOption':
foo.c:62: warning: too many arguments for format
foo.c: In function `main':
foo.c:36: warning: statement with no effect
foo.c:38: warning: statement with no effect
foo.c:40: warning: statement with no effect
foo.c:42: warning: statement with no effect

This is line 62 - scanf("d",&option);
You forgot the %

This is line 36 - case 1: input;
You forgot the () to turn the function name into a function call.

This article has been dead for over six months. Start a new discussion instead.