Compilare: user.cpp: In function ‘int main()’: user.cpp:19:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(v[i]+v[j]>=a) ^ user.cpp:12:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d%d", &n, &a, &b); ^ user.cpp:15:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&v[i]); ^