CSCI151 L26 P2

/*
 * prog.c
 *
 *  Created on: Nov 10, 2016
 *      Author: dastan.iyembergen
 */

#include <stdio.h>

int i;

typedef struct _weather{
    int rain;
    double temp;
    double wind;
    struct _weather *link;
} weather;

int totalRain(weather *first){
    int sum=0;
    weather *p=first;
    for (i=0; i<12; i++){
        sum+=(*p).rain;
        p=(*p).link;
    }
    return sum;
}

double lowestTemp(weather *first){
    double lowest=(*first).temp;
    weather *p=(*first).link;
    for (i=1; i<12; i++){
        if ((*p).temp<lowest)
            lowest=(*p).temp;
        p=(*p).link;
    }
    return lowest;
}

double aveWind(weather *first){
    double sum=0;
    weather *p=first;
    for (i=0; i<12; i++){
        sum+=(*p).wind;
        p=(*p).link;
    }
    return sum/12.0;
}

void printWeather(weather *first){
    weather *p=first;
    for (i=0; i<12; i++){
        printf("%4i %7.1f %6.1f\n", (*p).rain, (*p).temp, (*p).wind);
        p=(*p).link;
    }
}

int main(void) {
    FILE *infile;
    infile=fopen("astana.txt", "r");
    weather *first=NULL;
    weather *prev=NULL;
    for (i=0; i<12; i++){
        int r;
        double te, wi;
        fscanf(infile, "%i %lf %lf", &r, &te, &wi);
        weather *p=(weather*)malloc(sizeof(weather));
        (*p).rain=r;
        (*p).temp=te;
        (*p).wind=wi;
        (*p).link=NULL;
        if (first==NULL){
            first=p;
        } else{
            (*prev).link=p;
        }
        prev=p;
    }
    fclose(infile);
    printf("The total rainfall: %4i\n", totalRain(first));
    printf("The lowest temperature: %7.1f\n", lowestTemp(first));
    printf("average wind speed: %6.1f\n\n", aveWind(first));
    printWeather(first);
    return 0;
}