Portable printf format specifier for 64 bit hexadecimal?

 

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  • How to printf a 64-bit integer as hex? [duplicate] 2 answers

    • The PRIx64 macro in <inttypes.h> is what you're looking for.

    It's a string token, so you can use it as: fprintf(stdout, "answer = %"PRIx64"n", val);

    Since you specify %llX , you probably want uppercase; use: PRIX64

    您可以使用头<inttypes.h>定义的宏PRIx64或PRIX64 (for unsigned uppercase hexadecimal integer ) 。

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