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This noncompliant code example prints the value of x as an unsigned long long value, even though the value is of a programmer-defined integer type.

#include <stdio.h>

mytypedef_t x;

/* ... */

printf("%llu", (unsigned long long) x); 

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This compliant solution guarantees that the correct value of x is printed, regardless of its length, provided that mytypedef_t is an unsigned type.

#include <stdio.h>
#include <inttypes.h>

mytypedef_t x;

/* ... */

printf("%ju", (uintmax_t) x);

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The following noncompliant code example reads an unsigned long long value from standard input and stores the result in x, which is of a programmer-defined integer type.

#include <stdio.h>

mytypedef_t x;
/* ... */
if (scanf("%llu", &x) != 1) {
  /* handle error */
}

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This compliant solution guarantees that a correct value in the range of mytypedef_t is read, or an error condition is detected, assuming the value of MYTYPEDEF_MAX is correct as the largest value representable by mytypedef_t.

#include <stdio.h>
#include <inttypes.h>

mytypedef_t x;
uintmax_t temp;

/* ... */

if (scanf("%ju", &temp) != 1) {
  /* handle error */
}
if (temp > MYTYPEDEF_MAX) {
  /* handle error */
}
else {
  x = temp;

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