在C语言中编写一程序，实现从键盘输入一个大写字母，要求改用小写字母输出 C语言，从键盘输入一个大写字母，要求改用小写字母输出
C\u8bed\u8a00\uff0c\u4ece\u952e\u76d8\u8f93\u5165\u4e00\u4e2a\u5927\u5199\u5b57\u6bcd\uff0c\u8981\u6c42\u6539\u7528\u5c0f\u5199\u5b57\u6bcd\u8f93\u51faimport java.util.Scanner;
public class Aa ;
public Aa(){}
public static void main(String[] args) {
Aa aa=new Aa();
Scanner scan=new Scanner(System.in);
String a=scan.next();
char A=a.charAt(0);
char B=(char) (A+32);
System.out.print(B);
}
}
#include
#include
void main()
{
char word;
printf("\u8f93\u5165\u4e00\u4e2a\u5927\u5199\u5b57\u6bcd:");
scanf("%c",&word);
if(word>=65 && word<=90){
word += 32;
printf("\u5bf9\u5e94\u5c0f\u5199\u5b57\u6bcd\u4e3a:%c \n",word);
}else{
printf("Error:\u8f93\u5165\u7684\u4e0d\u662f\u5927\u5199\u5b57\u6bcd\uff0c\u8bf7\u91cd\u65b0\u8f93\u5165\uff01\n");
}
}
\u7a0b\u5e8f\u7ed3\u679c\u5982\u4e0b\uff1a

1\u3001\u9996\u5148\u7528vs2017\u8f6f\u4ef6\u65b0\u5efa\u4e00\u4e2a\u7a7a\u767d\u7684c\u8bed\u8a00\u6587\u4ef6\uff0c\u5f15\u5165\u5934\u6587\u4ef6\u5e76\u5efa\u7acb\u4e3b\u51fd\u6570\uff0c\u4e3b\u51fd\u6570\u4e2d\u5148\u5b9a\u4e492\u4e2achar\u7c7b\u578b\u7684\u53d8\u91cf\uff0c\u4e00\u4e2a\u7528\u6765\u63a5\u6536\u7528\u6237\u8f93\u5165\u7684\u5b57\u6bcd\uff0c\u53e6\u4e00\u4e2a\u7528\u6765\u63a5\u6536\u5904\u7406\u540e\u7684\u7ed3\u679c\uff1a
2\u3001\u63a5\u7740\u5148\u7528getchar\u51fd\u6570\u5c06\u7528\u6237\u8f93\u5165\u7684\u5b57\u7b26\u5b58\u5165\u53d8\u91cfa\u4e2d\u53bb\uff0c\u7136\u540e\u7528b\u52a0\u4e0a32\u5373\u53ef\u5f97\u5230\u5c0f\u5199\u5b57\u6bcd\uff0c\u539f\u56e0\u5c31\u662f\u7531\u4e8e\u5927\u5199\u5b57\u6bcd\u4e0e\u5c0f\u5199\u5b57\u6bcd\u4e4b\u95f4\u7684\u5dee\u503c\u4e3a 32\uff0c\u56e0\u6b64\u5c06\u5c0f\u5199\u5b57\u6bcd\u7684 ASCII \u7801\u503c \u52a0\u4e0a32\uff0c\u4fbf\u53ef\u5f97\u5230\u4e0e\u4e4b\u5bf9\u5e94\u7684\u5927\u5199\u5b57\u6bcd\u3002\u6700\u540e\u6253\u5370\u7ed3\u679c\u5373\u53ef\uff1a
3\u3001\u8fd0\u884c\u7f16\u8bd1\u7a0b\u5e8f\uff0c\u8fd9\u91cc\u8f93\u5165\u4efb\u610f\u4e00\u4e2a\u5b57\u6bcd\u6309\u4e0b\u56de\u8f66\uff0c\u5373\u53ef\u6253\u5370\u51fa\u5904\u7406\u540e\u7684\u5c0f\u5199\u5b57\u6bcd\u3002\u4ee5\u4e0a\u5c31\u662f\u7528C\u8bed\u8a00\u5904\u7406\u5927\u5199\u8f6c\u5c0f\u5199\u7684\u793a\u4f8b\uff1a
实现从键盘输入一个大写字母，改用小写字母输出，可以使用下面的方法：
#include<stdio.h>
int main(){
char a;
scanf("%c",&a);
printf("%c",a+32);
}
执行效果如下：
#include
void main()
{
char c;
printf("请输入一个大写字母");
scanf("%c",&c);
while(1)
{
if('A'=c)
{
printf("变换后为：%c\n",c+32);
return;
}
else
{
printf("请正确输入大写字母");
scanf("%c",&c);
}
}
}
编译已经通过：#include<stdio.h>
void main(void)
{
char c;
printf("enter:");
c=getchar();
if(c>='A'&& c<='Z')
c=c-('A'-'a');
putchar(c);
}
#include <stdio.h>void main()
{
char x;
scanf("%c",&x);
if ('A'<=x && x<='Z')
{
x+=32;
}
printf("%c\n",x);
}
#include <stdio.h>
int main(void) {
putchar(getchar() ^ 32);
}
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