Problem with CS50 IDE Debugger

Question

I am on Pset4 and running debugger. I don't know why the debugger stop when I "step over" in line 30 (fopen syntax). Although my coding is running on terminal with ./resize....

Here is the screenshot

Here is my code

int main(int argc, char* argv[]) {
// ensure proper usage
if (argc != 4)
{
    printf("Usage: ./copy n infile outfile\n");
    return 1;
}

// remember filenames and factor n
int n = atoi(argv[1]);
char* infile = argv[2];
char* outfile = argv[3];

// open input file 
FILE* inptr = fopen(infile, "r");
if (inptr == NULL)
{
    printf("Could not open %s.\n", infile);
    return 2;
}

// open output file
FILE* outptr = fopen(outfile, "w");
if (outptr == NULL)
{
    fclose(inptr);
    fprintf(stderr, "Could not create %s.\n", outfile);
    return 3;
}

// read infile's BITMAPFILEHEADER
BITMAPFILEHEADER bf;
fread(&bf, sizeof(BITMAPFILEHEADER), 1, inptr);

// read infile's BITMAPINFOHEADER
BITMAPINFOHEADER bi;
fread(&bi, sizeof(BITMAPINFOHEADER), 1, inptr);

// ensure infile is (likely) a 24-bit uncompressed BMP 4.0
if (bf.bfType != 0x4d42 || bf.bfOffBits != 54 || bi.biSize != 40 || 
    bi.biBitCount != 24 || bi.biCompression != 0)
{
    fclose(outptr);
    fclose(inptr);
    fprintf(stderr, "Unsupported file format.\n");
    return 4;
}

Please help me, Thanks in advance.

Answer 1

The graphical debugger seems to have problems with code that opens other files. You should use the command line gdb instead in these instances.