Compilare: user.cpp: In function ‘int main()’: user.cpp:35:25: warning: suggest parentheses around assignment used as truth value [-Wparentheses] while(i = n && j == n) ^ user.cpp:14:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:23:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &h[i][j]); ^ user.cpp:13:21: warning: ‘j’ may be used uninitialized in this function [-Wmaybe-uninitialized] register int i, j; ^