Compilare: user.cpp: In function ‘int main()’: user.cpp:20:9: warning: variable ‘l’ set but not used [-Wunused-but-set-variable] int l, c; ^ user.cpp:20:12: warning: variable ‘c’ set but not used [-Wunused-but-set-variable] int l, c; ^ user.cpp:17:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d", &n, &m, &k); ^ user.cpp:18:86: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i = 1; i <= n; i++) for(int j = 1; j <= m; j++) fscanf(fi,"%d", &v[i][j]); ^