1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | /* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */
#include <stdio.h>
#include <stdlib.h>
void transform_string(/* TODO */) { // works IN PLACE, i.e., modifies string
for(int i=0; i < strlen(s); i++) {
s[i] = /* TODO */
}
}
char to_lower(char ch) {
if(ch >= 'A' && ch <= 'Z') {
return 'a' + ch - 'A';
}
else {
return ch;
}
}
char to_upper(char ch) {
return ((ch >= 'a' && ch <= 'z') ? ('A' + ch - 'a') : ch);
}
int main(int argc, char* argv[]) {
char s[] = "happy";
transform_string(s, to_upper);
printf("%s", s); // print "HAPPY"
return EXIT_SUCCESS;
}
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