String to hexadecimal in c

char hex[] = "6A";                          // here is the hex string
int num = (int)strtol(hex, NULL, 16);       // number base 16
printf("%c\n", num);                        // print it as a char
printf("%d\n", num);                        // print it as decimal
printf("%X\n", num);                        // print it back as hex

Source: stackoverflow.com

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