Files in C

#include < stdio.h >



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\n");


for(i=1; i < =3;i++) {


fscanf(stdin,"%s %d %f %d",item,&number,&price,&quantity);


fprintf(fp,"%s %d %.2f %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);


}