Compilare: main.cpp: In function 'int main()': main.cpp:57:23: warning: converting to non-pointer type 'int' from NULL [-Wconversion-null] 57 | stivadubla1.first=NULL; | ^~~~ main.cpp:58:23: warning: converting to non-pointer type 'int' from NULL [-Wconversion-null] 58 | stivadubla2.first=NULL; | ^~~~ main.cpp:59:22: warning: converting to non-pointer type 'int' from NULL [-Wconversion-null] 59 | stivadubla1.last=NULL; | ^~~~ main.cpp:60:22: warning: converting to non-pointer type 'int' from NULL [-Wconversion-null] 60 | stivadubla2.last=NULL; | ^~~~ main.cpp:75:70: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 75 | if(isEmpty(stivadubla1)==true || isEmpty(stivadubla1)==false && a[i]>a[stivadubla1.last]) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:94:70: warning: suggest parentheses around '&&' within '||' [-Wparentheses] 94 | if(isEmpty(stivadubla2)==true || isEmpty(stivadubla2)==false && a[i]<a[stivadubla2.last]) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~