Compilare: main.cpp: In function 'int main()': main.cpp:14:9: warning: unused variable 'N' [-Wunused-variable] int N; ^ main.cpp:33:24: warning: unused variable 'mx' [-Wunused-variable] int nr_primes = 0, mx = 0, sum = 0; ^~ main.cpp:33:32: warning: unused variable 'sum' [-Wunused-variable] int nr_primes = 0, mx = 0, sum = 0; ^~~ main.cpp:48:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &T); ^ main.cpp:51:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &N); ^ main.cpp:55:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v); ^