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Convert ASCII to HEX

Posted on 2006-05-31
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Are there any easy C++ functions to easily convert from ASCII to Hex and Vice Versa

For example I need to convert a text file containing the following data:

192.168.1.50|192.168.1.100

to a hexadecimal file
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Question by:rkbhumagani
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e_tadeu earned 375 total points
ID: 16803922
Use sprintf with %x. You can try something like this:

char *s = "192.168.1.50|192.168.1.100";

int a[8];
sscanf(s, "%d.%d.%d.%d|%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5], &a[6], &a[7]);

char buf[256];
sprintf(buf, "%02x%02x%02x%02x%02x%02x%02x%02x", a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7]);

// write buf to file...
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Expert Comment

by:e_tadeu
ID: 16803937
Are you sure you want hexa and not binary? If you want to write binary, just do this:


char *s = "192.168.1.50|192.168.1.100";

unsigned char a[8];
sscanf(s, "%d.%d.%d.%d|%d.%d.%d.%d", &a[0], &a[1], &a[2], &a[3], &a[4], &a[5], &a[6], &a[7]);

// write a to a binary file
FILE *f = fopen("somefile.dat", "wb");
fwrite(a, 1, 8, f);

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