That's why there's no printf length modifier for char, float or double.

signed char c = 123;
int         i = 123;
float       f = 123;
double      d = 123;

printf("%d\n", i);   // ok
printf("%d\n", c);   // ok, even though %d expects int.
printf("%f\n", d);   // ok
printf("%f\n", f);   // ok, even though %f expects double.
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(Not sure why there's one for short since they are guaranteed to be no larger than an int and unsigned int respectively.)