Compilare: main.cpp:12:6: warning: built-in function 'exp' declared as non-function [-Wbuiltin-declaration-mismatch] 12 | char exp[100005]; | ^~~ main.cpp: In function 'int infixToPostfix(char*)': main.cpp:150:11: warning: control reaches end of non-void function [-Wreturn-type] 150 | strcpy(exp, postfixExpr); | ~~~~~~^~~~~~~~~~~~~~~~~~