Computer systems Course Materials & Test Answers | moodle.epfl.ch

What is the proper way to read an array of n double from a binary file myfile into

double tab[MAX]

(where n <= MAX)?

Assume count is already declared and has the proper type.

It's not possible in general since nb <= MAX ; we must have nb < MAX instead.

count = fread(tab, sizeof(n * double), 1, myfile);

count = fread(&tab[1], sizeof(double), n, myfile);

count = fread(tab, n * sizeof(double), 1, myfile);

count = fread(tab, sizeof(double), n, myfile);

✅

count = 0;
for (size_t i = 0; i < n; ++i) {
      count += fscanf(myfile, "%lf", tab + i);
    }

another way than the other proposals

count = 0;
for (size_t i = 0; i < n; ++i) {
      count += fread(&tab[i], sizeof(double), 1, myfile);
    }

View this question

Crowdly