Compilare: main.cpp: In function 'double aria()': main.cpp:34:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<v.size()&&(!ok); i++) ~^~~~~~~~~ main.cpp:35:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=i+1; j<v.size(); j++) ~^~~~~~~~~ main.cpp:45:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<v.size(); i++) ~^~~~~~~~~ main.cpp:54:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=2; i<v.size(); i++) ~^~~~~~~~~ main.cpp: In function 'void je(punct, punct, punct, punct)': main.cpp:69:7: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(a0.x==a1.x) ^