Compilare: main.cpp: In function 'multime intersect(multime, multime)': main.cpp:14:20: 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:14:39: 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:30:16: 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:30:35: 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:45:8: warning: statement has no effect [-Wunused-value] for(i;i<a.elem.size();i++) ^ main.cpp:45:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i;i<a.elem.size();i++) ~^~~~~~~~~~~~~~ main.cpp:47:8: warning: statement has no effect [-Wunused-value] for(j;j<b.elem.size();j++) ^ main.cpp:47:10: 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:58:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p<s.size() && s[p]=='+'){ ~^~~~~~~~~ main.cpp: In function 'multime factor()': main.cpp:68:11: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(p<s.size() && s[p]=='*'){ ~^~~~~~~~~ main.cpp: In function 'int main()': main.cpp:120:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i<aux.size() && isnum(aux[i])){ ~^~~~~~~~~~~