void diagonalfile()
{
	int x=0;
	int y=0;
	building[x][y]=number;
	int sum=0;

	printf("\n\n\n\t FILE OPEN \n\n\n");
	inp=fopen( " 2Dimdata.txt ","r");
	if(inp==NULL)
	{
		printf(" file 2Dimdata.txt failed to open");
		exit(0);
	}

	for(x=0; x<10;x++)
	{
		for(y=0; y<10;y++)
		{
			fscanf(inp,"%d",&number);
			printf("sum of diagonla equals %d",sum,building[x][y],(sum=sum+building[x][x]));
		}
	}
}