I have a technical issue compiling with mpicc

My gcc works fine when I compile '''gcc''' but I'm trying to compile a C program with '''mpicc''' and my terminal returns this error, which deletes also the script:

/usr/lib/gcc/x86_64-linux-gnu/7/../../../x86_64-linux-gnu/Scrt1.o: In function `_start':(.text+0x20): undefined reference to `main'collect2: error: ld returned 1 exit status

The compiling instructions are: mpicc -o p35.c.

How could I solve this?

My gcc version:

gcc --versiongcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0Copyright (C) 2017 Free Software Foundation, Inc.This is free software; see the source for copying conditions.  There is NOwarranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

My mpicc version:

mpicc --versiongcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0Copyright (C) 2017 Free Software Foundation, Inc.This is free software; see the source for copying conditions.  There is NOwarranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Thanks.