why the use of File type is said undeclared?

hi guys, i m a beginner for MPI programming.
i m doing a program to open a file, however, there is error saying that 'File' undeclared. but I thought File is a type like int or char, isnt it?
below is my codes:

Code:

#include "mpi.h"
#include 
#include 

#include 
#include 

int main(int argc, char **argv)
{
        int data[5][10];
        int i, j, x;
        int myid, numprocs;
        
        [COLOR=Red]File *fp;[/COLOR]

        MPI_Init(&argc, &argv);
        MPI_Comm_size(MPI_COMM_WORLD, &numprocs);
        MPI_Comm_rank(MPI_COMM_WORLD, &myid);

        if(myid == 0)
        {
                if((fp=fopen("/home/rayda/pic_1.txt", "r")) == NULL)
                {
                        printf("Cant open file\n");
                        exit(1);
                }
                for(i = 0; i < 5; i++)
                {
                        for(j = 0; j < 10; j++)
                        {
                                x = fgetc(fp);
                                if(x == 49)
                                {
                                        data[i][j] = 1;
                                }
                                else if(x == 48)
                                {
                                        data[i][j] = 0;
                                }
                                else
                                {
                                        j--;
                                }
                        }
                }
                for(i = 0; i < 5; i++)
                {
                        for(j = 0; j < 10; j++)
                        {
                                printf("%d", data[i][j]);
                        }
                        printf("\n");
                }
        }
        MPI_Finalize();
        return 0;
} 

i have been make the statement with error in red color. hopefully someone can tell me what's wrong with my code. thank you.