> For the complete documentation index, see [llms.txt](https://hkust-robotics-team.gitbook.io/hkust-robotics-team-software-tutorial/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hkust-robotics-team.gitbook.io/hkust-robotics-team-software-tutorial/tutorial/tutorial-0-self-learn-basic-c/homework/classwork-2-swapping-contents.md).

# Homework 2: Swapping contents

contents swapping

> It is recommended to understand everything in `Hello World!`, `Variables` before attempting this homework

Implement your code such that the values of `a` and `b` are swapped.

```c
#include <stdio.h>

int main() {
    float a = 4.0f, b= 3.7f, c;
    printf("before swapping, a = %f, b = %f\n", a, b);
  // your code starts here
  
  // your code ends here
    printf("after swapping, a = %f, b = %f\n", a, b);
    return 0;
}

```

### ZINC Submission

Submit your finished code to ZINC