integer-promotion

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Reading a signed char as unsigned - Type Promotion

Consider this little program: #include <stdio.h> int main() { char c = 0xFF; printf(\"%d\\n\", c); return 0;[详细]

2023-04-12 08:30 分类：问答
Is there a way to prove integral promotion to int?

In pure ansi C, is there any way to show that, given char c1 = 1, c2 = 2; the type of the following: c1 + c2[详细]

2023-03-23 16:35 分类：问答
Understanding getopt() example. Comparison of int to char

Hello all I hope you can help me understand why getopt used an int and the handling of the optopt variable in getopt. Pretty new to C++.[详细]

2023-02-13 04:04 分类：问答
Would making plain int 64-bit break a lot of reasonable code?

Until rec开发者_如何学编程ently, I\'d considered the decision by most systems implementors/vendors to keep plain int 32-bit even on 64-bit machines a sort of expedient wart. With modern C99 fixed-size[详细]

2023-02-01 22:34 分类：问答
What is wrong with this bit-manipulation code from an interview question?

I was having开发者_如何学编程 a look over this page: http://www.devbistro.com/tech-interview-questions/Cplusplus.jsp, and didn\'t understand this question:[详细]

2023-01-26 16:21 分类：问答
If char c = 0x80, why does printf("%d\n", c << 1) output -256?

#include<stdio.h> int main(void) { char c = 0x80; printf(\"%d\\n\", c << 1); return 0; } The output is -256 in this case. If I write c << 0 then the outp开发者_如何转开发ut is -128[详细]

2023-01-21 05:23 分类：问答
Yoda Conditions and integer promotion

When comparing a type larger than int, with an integer constant, should I place the constant on the left or the right to ensure the correct comparison is performed?[详细]

2023-01-16 19:16 分类：问答
Bitshift and integer promotion?

Normally, C requires that a binary operator\'s operands are promoted to the type of the higher-ranking operand. This can be exploited to avoid filling code with verbose casts, for example:[详细]

2023-01-11 07:18 分类：问答
argument promotions in C function calls

I learned from ----As to when default promotions kick in: default argument promotions are used exactly when the expected type of the argument is unknown, which is to say when ther开发者_高级运维e\'s n[详细]

2023-01-01 09:49 分类：问答
Copy files where lastwritetime -ge 3/26/2010 9:00pm with Powershell

I need to copy files in one directory to another directory where the lastwritetime is greater than or equal to 3/26/2010 9:00pm. 开发者_如何学Go I\'m using:[详细]

2022-12-26 23:49 分类：问答