Compilare: main.cpp: In function 'multime intersect(multime, multime)': main.cpp:19:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0,j=0; i<a.elem.size() && j<b.elem.size();) { ~^~~~~~~~~~~~~~ main.cpp:19:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0,j=0; i<a.elem.size() && j<b.elem.size();) { ~^~~~~~~~~~~~~~ main.cpp: In function 'multime reunion(multime, multime)': main.cpp:36:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0,j=0; i<a.elem.size() && j<b.elem.size();) { ~^~~~~~~~~~~~~~ main.cpp:36:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0,j=0; i<a.elem.size() && j<b.elem.size();) { ~^~~~~~~~~~~~~~ main.cpp:51:10: warning: statement has no effect [-Wunused-value] for(i; i<a.elem.size(); i++) ^ main.cpp:51:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i; i<a.elem.size(); i++) ~^~~~~~~~~~~~~~ main.cpp:53:10: warning: statement has no effect [-Wunused-value] for(j; j<b.elem.size(); j++) ^ main.cpp:53:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j; j<b.elem.size(); j++) ~^~~~~~~~~~~~~~ main.cpp: In function 'multime expresie()': main.cpp:66:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p<s.size() && s[p]=='+') { ~^~~~~~~~~ main.cpp: In function 'multime factor()': main.cpp:77:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p<s.size() && s[p]=='*') { ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:130:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<aux.size() && isnum(aux[i])) { ~^~~~~~~~~~~