You are not printing anything!
Print the return value of toupper()
.
printf("%c",toupper(*s));
문제
#include <stdio.h>
#include <ctype.h>
char* strcaps(char* s)
{
while (*s != '\0')
{
toupper(*s);
s++;
}
return s;
}
.
int main()
{
char makeCap[100];
printf("Type what you want to capitalize: ");
fgets(makeCap, 100, stdin);
strcaps(makeCap);
return 0;
}
this program compiles just fine, but when I run it, it doesn't output anything. what am i missing here?
해결책
You are not printing anything!
Print the return value of toupper()
.
printf("%c",toupper(*s));
다른 팁
You don't print anything, so of course it won't output anything.
char* strcaps(char* s){
char *p;
for (p=s; *p; ++p)
*p = toupper(*p);//maybe you want to change the original
return s;//your cord : return address point to '\0'
}
...
//main
printf("%s", strcaps(makeCap));