Compilare: user.cpp: In function ‘int main()’: user.cpp:64:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i <= n; i++) ^ user.cpp:93:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 2; i <= n; i++) ^ user.cpp:60:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &n,&l,&u); ^ user.cpp:66:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%u", &v[i]); ^