Parse Records

fscanf can parse simple structured records from a file.

parse_records.c

#include <stdio.h>

int main(void) {
    int bonus = ;
    FILE *file = fopen("parse_records_demo.txt", "w+");

    if (file == 0) {
        return 1;
    }

    fprintf(file, "A %d\n", 10 + bonus);
    fprintf(file, "B %d\n", 20);
    rewind(file);

    char name = 0;
    int score = 0;
    int total = 0;

    while (fscanf(file, " %c %d", &name, &score) == 2) {
        total += score;
    }

    fclose(file);
    remove("parse_records_demo.txt");

    printf("total=%d\n", total);
    return 0;
}

#include <stdio.h>

int main(void) {
    int bonus = ;
    FILE *file = fopen("parse_records_demo.txt", "w+");

    if (file == 0) {
        return 1;
    }

    fprintf(file, "A %d\n", 10 + bonus);
    fprintf(file, "B %d\n", 20);
    rewind(file);

    char name = 0;
    int score = 0;
    int total = 0;

    while (fscanf(file, " %c %d", &name, &score) == 2) {
        total += score;
    }

    fclose(file);
    remove("parse_records_demo.txt");

    printf("total=%d\n", total);
    return 0;
}

#include <stdio.h>

int main(void) {
    int bonus = ;
    FILE *file = fopen("parse_records_demo.txt", "w+");

    if (file == 0) {
        return 1;
    }

    fprintf(file, "A %d\n", 10 + bonus);
    fprintf(file, "B %d\n", 20);
    rewind(file);

    char name = 0;
    int score = 0;
    int total = 0;

    while (fscanf(file, " %c %d", &name, &score) == 2) {
        total += score;
    }

    fclose(file);
    remove("parse_records_demo.txt");

    printf("total=%d\n", total);
    return 0;
}

record fields Each successful scan fills the fields for one record.

running total The loop accumulates one field from each parsed record.