Compilare: main.cpp: In function 'long long int Primeb(long long int, long long int)': main.cpp:28:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < prime.size() && prime[i] <= b ; i++ ) ~~^~~~~~~~~~~~~~ main.cpp:37:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < primeb.size() ; j++ ) { ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:57:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d", &n ) ; ^ main.cpp:59:39: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%lld%lld", &a, &b ) ; ^