Compilare: main.cpp: In function 'bool comp(prod, prod)': main.cpp:18:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind<a.nume.size() && ind<b.nume.size()) ~~~^~~~~~~~~~~~~~ main.cpp:18:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(ind<a.nume.size() && ind<b.nume.size()) ~~~^~~~~~~~~~~~~~ main.cpp:24:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ind==a.nume.size()) return 1; ~~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:31:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<s.size();++i) ~^~~~~~~~~ main.cpp:38:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(s[i]<='z' && s[i]>='a' && i<s.size()) ~^~~~~~~~~ main.cpp:43:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(s[i]==' ' && i<s.size()) ++i; ~^~~~~~~~~ main.cpp:45:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(s[i]<='9' && s[i]>='0' && i<s.size()) ~^~~~~~~~~ main.cpp:65:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(s[i]<='9' && s[i]>='0' && i<s.size()) ~^~~~~~~~~