關於unsigned long 轉化我char[]的問題

關於unsigned long 轉化我char[]的問題

unsigned long aa = 199191928;

.....

(void)snprintf( buf, sizeof( buf ),"%ld", aa );

...

(void)fprintf(stderr,"buf = %ld\n", atol(buf) );

.....

轉化處理的位數和正確性與系統允許的unsigned long 和sizeof( buf )有關係。