Thread: I need help!!!

hi everybody

firstly, my english is not good,so I'm sorry!now I try to explain my question. I wrote a small program and I didn't find a sollution my question,so I need your help

question:
a. Using an editor, create a file containing the following car numbers, number of miles driven, and number of gallons of gas used by each car:

Car No. Miles Driven Gallons Used
54---------- 250 ----------- 19
62---------- 525---------- 38
71---------- 123---------- 6
85 ---------- 1322---------- 86
97---------- 235---------- 14

b. Write a C program that reads the data in the file created in part a and displays the car number, miles driven, gallons used, and the miles per gallon for each car as in the table above. The output should also display the total miles driven, total gallons used, and average miles per gallon for all the cars. These totals should be displayed at the end of the table.

SYNTAX:

Code:

#include<stdio.h>
int main(void)
{
	int car,mile,gallon,
		sum_mile=0,sum_gallon=0;
	
	
	FILE *inp;//pointer for input file

	inp=fopen("cars.txt","r");

	//read to file and write the screen	
	printf("Car No.		Miles Driven		Gallons Used\n");
	printf("------------------------------------------------------\n");

	fscanf(inp,"%d%d%d",&car,&mile,&gallon);
	printf("%d \t\t %d \t\t\t %d\n ",car,mile,gallon);
	
	fscanf(inp,"%d%d%d",&car,&mile,&gallon);
	printf("%d \t\t %d \t\t\t %d\n ",car,mile,gallon);
	
	fscanf(inp,"%d%d%d",&car,&mile,&gallon);
	printf("%d \t\t %d \t\t\t %d\n ",car,mile,gallon);
	
	fscanf(inp,"%d%d%d",&car,&mile,&gallon);
	printf("%d \t\t %d \t\t\t %d\n ",car,mile,gallon);

	fscanf(inp,"%d%d%d",&car,&mile,&gallon);
	printf("%d \t\t %d \t\t\t %d\n ",car,mile,gallon);

	printf("-----------------------------------------------------\n");

	fclose(inp);
	
	return(0);
}

I did't write in this part: The output should also display the total miles driven, total gallons used, and average miles per gallon for all the cars. These totals should be displayed at the end of the table.

Good night!

What problem are you having? You already have sum variables laid out; you just need to add the values to them after reading each car in. Once you're done reading the cars in, calculate the average and print out the required information.