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C Brain Teasers: Exercise Your Mind

Calculating Nested Values

Understand how to analyze and predict outputs from nested operations in C programming puzzles. This lesson helps you develop deeper insight into code behavior and improve problem-solving strategies by interpreting complex nested expressions.

We'll cover the following...

Puzzle code

Read carefully the code given below:

C
#include <stdio.h>
float p(float a, float b)
{
  return((b<100.0)?a+(b*b/p(a+2.0, b+1.0)):b*b);
}
int main()
{
  printf("%.7f\n", 4.0/p(1.0, 1.0));
  return(0);
}

Your task: Guess the output

Attempt the following test to assess your understanding.

Technical Quiz
1.

What is the expected output of the above code?

A.
3.1415925
B.
2.7182818
C.
1.4142135
D.
0.5772157
1 / 1

Let's discuss the code and output together in the next lesson.