文字和标识符之外不允许使用非ASCII字符(C编程)

Question

好的所以我正在为课程编写代码,我认为一切都是正确的,除非我在printf语句中遇到错误我不知道如何做c代码而我的老师让我们自学.我收到一个未声明的标识符错误以及printf语句中的非ASCII字符错误有人可以帮我弄清楚为什么我会收到这些错误？我只是希望他们逐字逐句地打印出那个陈述,那么为什么它会把它看成不同的东西呢？

#include <inttypes.h>
#include <stdio.h>

typedef enum{false, true} bool;

bool is_little_endian()
{
    int x = 1;
   char *y = (char*)&x;
    return 1;
}

unsigned int merge_bytes( unsigned int x, unsigned int y )
{
    return (y & 0xffffff00) | (x & 0xff);
}

unsigned int replace_byte (unsigned int x, int i, unsigned char b)
{

int shift = (b << (8 * i));
int mask = 0xff << shift;
return (~mask & x) | shift;
}

int main()
{
if( is_little_endian() )
{
printf(“Your machine is a Little Endian machine\n”);
}

int x = 0x89ABCDEF;
int y = 0x76543210;
printf(“Merged number = 0x%x\n”, merge_bytes(x,y));
unsigned char z= 0x22;
printf(“Replaced number = 0x%x\n”, replace_byte(x,3,z));
return 0;
}

这是我得到的错误

HW3.c:30:8: error: non-ASCII characters are not allowed outside of literals and
      identifiers
printf(“Your machine is a Little Endian machine\n”);
       ^
HW3.c:30:11: error: use of undeclared identifier 'Your'
printf(“Your machine is a Little Endian machine\n”);
        ^
HW3.c:30:52: error: non-ASCII characters are not allowed outside of literals and
      identifiers
printf(“Your machine is a Little Endian machine\n”);
                                                 ^
HW3.c:35:8: error: non-ASCII characters are not allowed outside of literals and
      identifiers
printf(“Merged number = 0x%x\n”, merge_bytes(x,y));
       ^
HW3.c:35:11: error: use of undeclared identifier 'Merged'
printf(“Merged number = 0x%x\n”, merge_bytes(x,y));
        ^
HW3.c:35:33: error: non-ASCII characters are not allowed outside of literals and
      identifiers
printf(“Merged number = 0x%x\n”, merge_bytes(x,y));
                              ^
HW3.c:37:8: error: non-ASCII characters are not allowed outside of literals and
      identifiers
printf(“Replaced number = 0x%x\n”, replace_byte(x,3,z));
       ^
HW3.c:37:11: error: use of undeclared identifier 'Replaced'
printf(“Replaced number = 0x%x\n”, replace_byte(x,3,z));
        ^
HW3.c:37:35: error: non-ASCII characters are not allowed outside of literals and
      identifiers
printf(“Replaced number = 0x%x\n”, replace_byte(x,3,z));
                                ^
9 errors generated.

Answer 1

看看(“Your machine is a Little Endian machine\n”);.注意"曲线引号":这些显然不是ASCII引号(看起来像这样:) ".你必须用"直引号"替换它们.(这也适用于所有其他字符串).

不要在任何不适当的文本编辑器中编辑代码.特别是,不要在MS Word,写字板或富文本编辑器中编辑代码,因为您可能会遇到类似这样的有趣问题.

Answer 2

如果您进行复制和粘贴，则可能会遇到这些问题。答案是删除所有@、“等符号，然后使用键盘重做。希望这会有所帮助。