Question

How to read and write wide characters to a file in C

Answer 1

#include <stdio.h>
#include <wchar.h>

int main() {
    int n = 435;
    double pi = 3.14;
    wchar_t wch = 'A';
    wchar_t wstr[32] = L"abc";

    FILE* writefp = fopen("d:\\data.txt", "w");
    int total_chars_written_to_file = fwprintf_s(writefp, L"%d%lf%c%s", n, pi, wch, wstr);

    fclose(writefp);

    wprintf(L"total chars written = %d\n", total_chars_written_to_file);

    
    FILE* readfp = fopen("d:\\data.txt", "r");

    n = 0;
    pi = 0.0;
    wch = ' ';
    wstr[0] = L"";

    fwscanf(readfp, L"%d", &n);
    fwscanf(readfp, L"%lf", &pi);
    fwscanf(readfp, L"%c", &wch);
    fwscanf(readfp, L"%s", wstr);

    fclose(readfp);
    
    wprintf(L"%d %lf %c %s", n, pi, wch, wstr);

    return 0;
}



/*
run:

total chars written = 15
4353 0.140000 A abc

*/

 

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