Compilare: user.cpp:43:25: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] myIfstream fin ("rev.in"); ^ user.cpp: In function ‘int main()’: user.cpp:57:38: warning: unused variable ‘poz’ [-Wunused-variable] int n, m, i, xx, yy, kk, u, lim, poz, j, st, dr, s, s1, l, p = 0, k1, k2, num, k, num2, cy; ^ user.cpp:57:87: warning: unused variable ‘num2’ [-Wunused-variable] int n, m, i, xx, yy, kk, u, lim, poz, j, st, dr, s, s1, l, p = 0, k1, k2, num, k, num2, cy; ^ user.cpp: In member function ‘void myIfstream::advance()’: user.cpp:20:43: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread (buffer, 1, SIZE, input); ^ user.cpp: In constructor ‘myIfstream::myIfstream(char*)’: user.cpp:29:39: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread (buffer, 1, SIZE, input); ^