c中uint32转为string

#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <stdio.h>
#include <inttypes.h>
#include <sys/types.h>

int
main(int argc, char const *argv[])
{
     char str[11]; /* 11 bytes: 10 for the digits, 1 for the null character */
     uint32_t n = 1;
     snprintf(str, sizeof str, "%lu", (unsigned long)n); /* Method 1 */
     printf("s1 = %s, strlen = %u\n", str, (unsigned)strlen(str));

     snprintf(str, sizeof str, "%" PRIu32, n); /* Method 2 */
     printf("s2 = %s, strlen = %u\n", str, (unsigned)strlen(str));

}

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