#include <stdio.h>

int main() {
    FILE *f = fopen("text.txt", "w");

    int num = 123;
    fprintf(f, "%d\n", num);

    fclose(f);

    // Read back
    f = fopen("text.txt", "r");

    int x;
    fscanf(f, "%d", &x);

    fclose(f);

    printf("Read from text file: %d\n", x);

    return 0;
}