Thread: Reading array of complex numbers from file (.txt)

Hello everyone,

I have successfully WRITTEN an array of complex numbers into .txt file using fprintf and scanf(). However, I have no idea how to READ this file. Please see the attached code and reply with your suggestions.

Thank you in advance!!

Joealem.

Code:

#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<complex.h>

int main()
{


		
	_Complex double x[2][2],y[2][2];
	x[0][0]=1+1i;
	x[0][1]=1+2i;
        x[1][0]=2+1i;
	x[1][1]=2+2i;
	
	
	//Writing the above complex array into .txt file
	FILE *fp;
	
	fp=fopen("tdata.txt", "w");
	
	int j,k;
	for(j=0;j<2;j++)
	{
		for (k=0; k<2; k++) {
			fprintf(fp,"%g+%gi\t",creal(x[j][k]),cimag(x[j][k]));
						
		}
		fprintf(fp,"\n");
	}
	fclose(fp);
	
	
	
	
	//Reading the file from .txt file 
	FILE *hFile;
	hFile = fopen("tdata.txt", "r");
	
	
	if (hFile == NULL)
	{
		printf("FILE NOT FOUND\n");// Error, file not found
	}
	else
	{
		
	
		for(j=0;j<2; j++)
		{
			
			for (k=0;k<2;k++)
			{
				/// read from file and copy to y array
				
                fscanf(hFile, "???\t", &y????); 				
			}
			fprintf(hFile,"\n");
		}
		
	}
	fclose(hFile);
	 
	printf("\n y[0][0]=%g+%gi\n",creal(y[0][0]),cimag(y[0][0]));
	
}

Code:

                fscanf(hFile, "???\t", &y????); 			

  fscanf(hFile,"%lf%lf",&re,&im);
  c = re + im * I;

It works. Thank you so much!!!