[File Pointer][C language] How to get file size

[File Pointer][C language] How to get file size

int GetFileSize(FILE *fp)

{

    int prev=ftell(fp);

    

    fseek(fp, 0L, SEEK_END);

    int sz=ftell(fp);

    fseek(fp,prev,SEEK_SET);

    return sz;

}



Reference:

• 
   C 語言標準函數庫分類導覽 - stdio.h ftell()