Compilare: user.cpp: In function ‘int main()’: user.cpp:2:153: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] using namespace std;int x,p=-1,i;vector<int>s;string a,b,z="strmatch.";int main(){ifstream f(z+"in");ofstream g(z+"out");f>>a>>b;while(p=b.find(a,p+1)>-1)x++,s.push_back(p);g<<x<<"\n";for(;i<min(x,1000);)g<<s[i++]<<" ";} ^ user.cpp:2:153: warning: suggest parentheses around assignment used as truth value [-Wparentheses]