文件读取和写入

#include<stdio.h>
#include<string.h>
extern void solve();
int main(void) {
    FILE *f = fopen("a.txt", "w");
    fprintf(f, "%d %d %d\n", 100, 123, 100);
    fclose(f);
    int a, b, c;
    solve();
    f = fopen("b.txt", "r");
    int juge = 1;
    fscanf(f, "%d %d %d", &a, &b, &c);
    if (a != 100 || b != 123 || c != 100)
        juge = 0;
    if (juge) printf("YES");
    else printf("NO");
    return 0;
}

void solve() {
    int n[3], k;
    FILE *fp, *q;
    fp = fopen("a.txt", "r");
    for (k = 0; k < 3; k++) {
        fscanf(fp, "%d", &n[k]);
    }
    q = fopen("b.txt", "w");
    for (k = 0; k < 3; k++) {
        fprintf(q, "%d ", *(n + k));
    }
    fclose(fp);
    fclose(q);
}