Compilare: user.cpp: In function ‘bool cmp(pimp, pimp)’: user.cpp:18:11: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(u.n==w.n) ^ user.cpp: In function ‘int main()’: user.cpp:30:31: warning: format ‘%d’ expects argument of type ‘int*’, but argument 5 has type ‘long long unsigned int*’ [-Wformat=] fscanf(f,"%d%d%d",&n,&m,&k); ^ user.cpp:85:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=k;i++) ^ user.cpp:29:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&p); ^ user.cpp:30:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d",&n,&m,&k); ^ user.cpp:35:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[c].n); ^