2012年计算机二级C语言单项选择题及答案解析精选（国外英文资料）.doc

2012年计算机二级C语言单项选择题及答案解析精选（国外英文资料） [1.1] answer: A Note: int is the keyword in C 【 1.2 】 answer: B [1.3] answer: A [1.4] answer: B Note: include is a preprocessing command; The scanf function name; Type is not a keyword in the C language. [1.5] answer: D 【 1.6 】 answer: D [1.7] answer: A [1.8] answer: A Note: int represents the range of -32768 ~ 32767. 【 1.9 】 answer: D Note: - 1 integer constants in a computer is expressed as complement, 1111, 1111, 1111, 1111 in hexadecimal display this number, the leftmost 1 will not be interpreted as the sign bit, but with the right of other common converted to hexadecimal number. [1.10] the answer: B Note: the number of the long integer 32768 is 1000 0000 0000 0000, which is the complement of -32768 when the output is in general integer. 【 1.11 】 answer: C Note: the number 65539 for the long integer is 0001 0000 0000 0000 0011. When the output is in general integer, only the right 16-bit binary number is converted to decimal number. [1.12] answer: A Note: in C, the negative number of int is represented by a complement. [1.13] answer: D [1.14] answer: C Note: variable c is a character type, which is assigned by the character constants. The character constants must be enclosed in single quotes, so B is wrong; In single or double quotation marks, the backslash \ is used to indicate escape characters, and A is wrong to use the backslash when there is no quotation marks. The C option has a backslash in the single quotation mark that represents a escape character with the following figure; Single quotes allow only one character, and the D option has four characters in a single quote, which is false. [1.15] answer: C 【 1.16 】 answer: D Note: the null character and the space character are two different characters, the ASCII value of the space character is 32, the ASCII value of the null character is 0. [1.17] answer: A 【 1.18 】 answer: B [1.19] answer: A [1.20] answer: C [1.21] the answer: B Note: from pure C language syntax, option B a