Compilare: user.cpp: In function ‘int main()’: user.cpp:59:15: warning: unused variable ‘a’ [-Wunused-variable] int i=0,j,a=1,b=1,nrc; ^ user.cpp:59:19: warning: unused variable ‘b’ [-Wunused-variable] int i=0,j,a=1,b=1,nrc; ^ user.cpp:59:23: warning: unused variable ‘nrc’ [-Wunused-variable] int i=0,j,a=1,b=1,nrc; ^ user.cpp: In function ‘void citeste()’: user.cpp:9:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("perm2.in","r",stdin); ^ user.cpp:10:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:12:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(i=1; i<=n; i++) scanf("%d",&v[i]); ^