namespacesrc{voidfoo(){int x =321;}voidmain(){foo();};constchar*a ="foo";typedefunsignedintnat;int p =1*2*3*4;int squared = p * p;classX{constchar*foo(inti){if(i ==0)return"foo";return0;}public:X(){};intid(inti){return i;}};}voidm(){int x =0+0+0;}int um =1*2+3;voidf1(){{(void)__func__;;;}}