Thread: intro to c programming assignment help

hey im just having a little trouble with the problem solving behind this assignment, can't quite get my loops to output and save what I want them too...
anyways the goal is to use an input file with recorded tire revolutions/gas used to average gas mile and output a graph of it in 5 minute intervals.

anywho, this is the code i've got so far... trying to have it average out 900 seconds into 3 5-min intervals

Code:

#include <stdio.h>

#define PI 3.14159
#define INCH_IN_MILE 63360

int main() {
    
    FILE *ifp;
    int minTrip, intervals;
    double revs, gas, mileage[6], fueleffic, curMileage[60], totMileage, radius;
    
    // Open file and read in data
    ifp = fopen("sample.txt","r");
    fscanf(ifp, "%d%d", &minTrip, &radius);
    
    printf("min in trip = %d/n", minTrip);
    printf("radius = %d", radius);
    
    intervals = minTrip/5;
    int cases;
    for (cases=0; cases<intervals; cases++) {
        double totRevs = 0, totGas = 0;
        int i;
        for (i=1; i<=300; i++) {
            fscanf(ifp, "%lf%lf", &revs, &gas);
            totRevs = revs+totRevs;
            totGas = gas+totGas;
        }
        radius = radius/INCH_IN_MILE; // MAY BE INT!?!?
        mileage[cases] = (2*PI*radius*totRevs)/totGas;
        //printf("avg mil = %lf, %lf, %lf", mileage[0], mileage[1], mileage[2]);

    }
    
system("PAUSE");
return(0);        
}

and here is the sample file...

also, here is the programming assignment in full if someone could hint me in the right direction: