1.
This statement is usually used in the letter reading operation
while (（c = getchar() ) != EOF)
When doing the exercise, I did not pay attention to the importance of brackets and wrote
while (c = getchar() != EOF)
As a result, putchar(c) is garbled.
Analysis:
Although the returned bool value is 1, the value obtained by c is garbled. Given that there are only two judgment symbols in the statement
Guess that the symbol priority causes the garbled code?
It is speculated that the value assigned to c is int 1. But when it is output as char, it is garbled. Shouldn't it be treated as ACSII code?
if ((c == ' ') || (c == t) )
if (flag == 0)
{
}
2.
char
char s[] = {1,4};
Can't char array be stored like that?
However, after using c = getchar();, even though c stores numbers, it is still of char type.
We can have s[i] = c;, and the output is also the correct value (keyboard input 123, s element is also 123);
when executing, a Segmentation fault (core dumped) error occurs. Since array operations are the main problem, it is initially determined that the error is caused by array out of bounds.
Keywords：getchar
Reference address：Data type error encountered when using getchar()
This statement is usually used in the letter reading operation
while (（c = getchar() ) != EOF)
When doing the exercise, I did not pay attention to the importance of brackets and wrote
while (c = getchar() != EOF)
As a result, putchar(c) is garbled.
Analysis:
Although the returned bool value is 1, the value obtained by c is garbled. Given that there are only two judgment symbols in the statement
Guess that the symbol priority causes the garbled code?
It is speculated that the value assigned to c is int 1. But when it is output as char, it is garbled. Shouldn't it be treated as ACSII code?
if ((c == ' ') || (c == t) )
if (flag == 0)
{
}
2.
char
char s[] = {1,4};
Can't char array be stored like that?
However, after using c = getchar();, even though c stores numbers, it is still of char type.
We can have s[i] = c;, and the output is also the correct value (keyboard input 123, s element is also 123);
when executing, a Segmentation fault (core dumped) error occurs. Since array operations are the main problem, it is initially determined that the error is caused by array out of bounds.
Yes, it is caused by array out of bounds! For array s[10], the actual range is s[0]~s[9]! Never store anything in s[10]. I did #! #! #! #! Fortunately, only the end character '' was stored, which does not affect the surface display effect. The principle of counting from 0 is a legacy of C language history. Although it is not in line with the custom, it has become a convention.
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