Exceptional C++ Style 40 New Engineering Puzzles, Programming Problems, and Solutions

Chapter 32. Slight Typos? Graphic Language and Other Curiosities

Difficulty: 5

Sometimes even small and hard-to-see typos can accidentally have a significant effect on code. To illustrate how hard typos can be to see and how easy phantom typos are to see accidentally even when they're not there, consider these examples.

Attempt to answer the following questions without using a compiler.

Guru Question

1. What is the output of the following program on a standards-conforming C++ compiler?

   // Example 32-1
   //
   #include <iostream>
   #include <iomanip>
   
   int main() {
    int x = 1;
    for(int i = 0; i < 100; ++i);
     // What will the next line do? Increment???????????/
     ++x;
    std::cout << x << std::endl;
   }
   

2. How many distinct errors should be reported when compiling the following ...