C Code Jokes

Here are some C code with the JavaScript quirks. Credits to luna.

#include <stdio.h>

int main() {
  puts("-0.5" + 1);
  printf("%d\n", 50 ** "2");
  return 0;
}

To build and run the above code, just do the following and ignore the warnings.

$ gcc c-js.c && ./a.out
0.5
2500

Let’s look at the warnings first.

c-js.c:4:15: warning: adding 'int' to a string does not append to the string [-Wstring-plus-int]
  puts("-0.5" + 1);
       ~~~~~~~^~~
c-js.c:4:15: note: use array indexing to silence this warning
  puts("-0.5" + 1);
              ^
       &      [  ]
1 warning generated.

Now let’s explain it.

puts takes a const char* as the param. "-0.5" is a string.

50 ** "2" = 50 * (*"2") = 50 * ("2"[0]) = 50 * ('2') = 50 * 50

The ASCII code of the digit 2 happens to be 50.