Warnings while learning C language in the examples

Question

I tried few examples to learn about the "get()" function but every time I tried them, I have this warning message :

./Playground/file0.c: In function 'main':
./Playground/file0.c:6:3: warning: implicit declaration of function 'gets'; did you mean 'fgets'? [-Wimplicit-function-declaration]
6 | gets(a);
| ^~~~
| fgets
../Playground/: /tmp/cci1fCkd.o: in function main':
file0.c:(.text+0x15): warning: the gets' function is dangerous and should not be used.

WHY ?

Answer 1

https://www.sololearn.com/discuss/2652684/?ref=app
https://www.sololearn.com/discuss/3010042/?ref=app
https://www.sololearn.com/discuss/2255358/?ref=app