#Meta-Wlp: #Macro: TITLE wlp: Learn C (IV) p. 2
#include<stdio.h> /* a function called make_me_upper, called by main */ int make_me_upper( char * s ) { int delta ; delta = 'a' - 'A' ; while (*s) { *s -= delta ; s++ ; } } int main(){ char * t ; t = "shout" ; make_me_upper(t) ; /* the function call */ printf ("%s!\n",t) ; }Why did the s++ in make_me_upper not change the value of t in main? #Shuffle: none $PAGE$-A $PAGE$-B $PAGE$-C Return to Learn C Table of Contents #: Because s and t are different names. #: Because C always uses call-by-value. #: It does change the value of t in main! t now points to the string SHOUT. #: