输出混乱

Question

Shouldn't the output be: Heo Word? as it will print the letter as long as they aren't 'l', but the output I get is: eo World?

   #include <iostream> 
   using namespace std; 
   int main() {  
       char str[] = "Hello World\n";  
       char* p = str;   
       while ( *p++ ) {
           if ( *p != 'l' )       
               cout << *p;
       } 
   }

Answer 1

The code in the while loop condition already increments the pointer value

while ( *p++ )

thus the check inside the loops scope

if ( *p != 'l' )

always misses the 1st character.

The easiest and most comprehensible way to rewrite this loop is probably

 char str[] = "Hello World\n";  
 for (char*p = str; *p; ++p) {
     if ( *p != 'l' )       
         cout << *p;
 } 

Working online example .