Compilare: user.cpp: In function ‘int frac(int)’: user.cpp:10:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(pt[i]<p) ^ user.cpp: In function ‘int main()’: user.cpp:24:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nr==n) {g<<p-p%5;w=0;} ^ user.cpp:25:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nr<n) st=p+1; else if(nr>n) dr=p-1; ^ user.cpp:25:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nr<n) st=p+1; else if(nr>n) dr=p-1; ^