Compilare: user.cpp: In function ‘int f()’: user.cpp:2:127: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] using namespace std; FILE*fin=fopen("adunare.in","r"),*fout=fopen("adunare.out","w");int f(){static int n; fscanf(fin,"%d",&n); return n;} int main(){ int n; fscanf(fin,"%d",&n); fprintf(fout,"%d",n+f()); return 0;} ^ user.cpp: In function ‘int main()’: user.cpp:2:179: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] using namespace std; FILE*fin=fopen("adunare.in","r"),*fout=fopen("adunare.out","w");int f(){static int n; fscanf(fin,"%d",&n); return n;} int main(){ int n; fscanf(fin,"%d",&n); fprintf(fout,"%d",n+f()); return 0;} ^