#include <stdio.h>
#include <stdlib.h>

//int main(void)
//{
//    FILE * fp;
//    char * line = NULL;
//    size_t len = 0;
//    ssize_t read;
//
//    fp = fopen("/etc/fstab", "r");
//    if (fp == NULL)
//        exit(EXIT_FAILURE);
//
//    while ((read = getline(&line, &len, fp)) != -1) {
//        printf("Retrieved line of length %zu:\n", read);
//        printf("%s", line);
//    }
//
//    fclose(fp);
//    if (line)
//        free(line);
//    exit(EXIT_SUCCESS);
//}

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MAX_LINE_LENGTH 1000

int main() {
    int num;
    FILE *fptr;
    char line[MAX_LINE_LENGTH];

    fptr = fopen("../gene.txt", "r");

    if (fptr == NULL) {
        printf("File is empty!");
        exit(1);
    }

    double sum = 0.0;
    while (fgets(line, MAX_LINE_LENGTH, fptr)!=NULL) {
//        printf("%s", line);

        char gene[MAX_LINE_LENGTH];
        double weight;
        sscanf(line,"%s %lf", gene, &weight);

        if (strchr(gene, 'A') != NULL) {
            printf("\nGene A: %s has weight %lf\n", gene, weight);
            sum += weight;
        }
    }

    printf("Total sum for gene A is %lf\n", sum);
}