范例:
/*找出字符串str中为大写英文字母的字符*/
#include <ctype.h>
main()
{
char str[]="123c@#FDsP[e?";
int i;
for(i=0;str[i]!=0;i++)
if(isupper(str[i])) printf("%c is an uppercase
character\n",str[i]);
}
执行 F is an uppercase character
D is an uppercase character
P is an uppercase character |