File Handling3.c

#include<stdio.h>
int main(){
	FILE *fp;
	int number,quantity,i;
	float price,value;
	char item[10],filename[10];
	printf("Input file name\n");
	scanf("%s",filename);
	fp=fopen(filename,"w");
	printf("Input inventory data\n\n");
	printf("Item name     Number     Price      Quantity\n");
	for(i=1;i<=3;i++)
	{
		fscanf(stdin,"%s %d %f %d",&item,&number,&price,&quantity);
		fprintf(fp,"%s %d %f %d",item,number,price,quantity);
	}
	fclose(fp);
	fprintf(stdout,"\n\n");
	fp=fopen(filename,"r");
	printf("Item name     Number    Price       Quantity     Value\n");
	for(i=1;i<=3;i++)
	{
		fscanf(fp,"%s %d %f %d",&item,&number,&price,&quantity);
		value=price*quantity;
		fprintf(stdout,"%-8s %7d %8.2f %8d %11.2f\n",item,number,price,quantity,value);
	}
	fclose(fp);
}