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c語言程式問題
Sep 10th 2014, 04:16

#include
#include
#include
void letterconvert(char*);
int main(void)
{
char *ptr="AbcdEFgHijKLmn"; /* 定義原字串 */
int i;

printf("原字串 %s\n",ptr);
for (i=0;iletterconvert(ptr+i);
printf("新字串 %s\n",ptr);

system("pause");
return 0;
}

void letterconvert(char *a)
{
if ((int)*a<97)
*a+= 32;
else
*a-= 32;
}

此程式碼我不管怎麼改都沒辦法轉大小寫子母,請大大幫我解答一下(3Q)

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