Compilare: main.cpp:3:1: warning: 'typedef' was ignored in this declaration typedef struct nod{ ^~~~~~~ main.cpp: In function 'void dfsmodif(int)': main.cpp:13:9: warning: unused variable 'i' [-Wunused-variable] int i; ^ main.cpp: In function 'void dfs(int)': main.cpp:32:9: warning: unused variable 'i' [-Wunused-variable] int i; ^ main.cpp: In function 'int main()': main.cpp:52:25: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ main.cpp:54:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &a[2*i]); ^ main.cpp:57:38: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &a[2*i + 1]); ^