Compilare: user.cpp: In function ‘int main()’: user.cpp:39:9: warning: unused variable ‘c1’ [-Wunused-variable] int c1 = 1; ^ user.cpp:35:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^ user.cpp:38:57: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i = 0; i< n; i++) {fscanf(fin, "%d", &v1[i]);if(v1[i] >= NUM)while(1){};if(!counter[v1[i]]) counter[v1[i]] = 1;} ^