#include <stdio.h>
int lower(int c){
if (c >= 'A' && c <= 'Z')
return c + 'a' - 'A';
else
return c;
}
int main()
{
int c;
while ((c = getchar()) != EOF)
putchar(lower(c));
return 0;
}
原创文章,作者:ItWorker,如若转载,请注明出处:https://blog.ytso.com/tech/pnotes/266648.html