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单选题 What will be displayed by the following code?char s2[7] = "Dallas";char s1[14] = "Dallas";strcat(s1, s2);cout << s1
学科：C++语言程序设计
时间：2026-03-24 23:33:53
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题目1单选题
The ? mark in the following code should be replaced by ___________. #include <iostream> #include <cctype> #include <cstring> using namespace std; int countLetters(const char s[ ]) { int count = 0; for (int i = 0; i < ? ; i++) { if (isalpha(s[i])) count++; } return count; } int main( ) { // Prompt the user to enter a string cout << "Enter a string: "; char s[80]; cin.getline(s, 80); cout << "The number of letters in " << s << " is " << countLetters(s) << endl; return 0; }A. 80B. 79C. strlen(s)D. strlen(s) – 1
题目2单选题
Are the following two declarations the same?char city[7] = "Dallas";char city[ ] = "Dallas"A. yesB. no
题目3单选题
Suppose char city[7] = "Dallas"; what is the output of the following statement?cout << cityA. DB. DallasC. Dallas0D. nothing printed
题目4单选题
设有数组定义:char array[ ] = "China"; 则数组 array 所占的空间为( )A. 四个字节B. 五个字节C. 六个字节D. 七个字节
题目5单选题
以下不能正确地为字符串赋初值的语句是( )A. char str[5] = "good!"B. char str[ ] = "good!"C. char str[8] = "good!"D. char str[5] = {'g', 'o', 'o', 'd', '\0'}
题目6单选题
What will be displayed by the following code?char s2[7] = "Dallas";char s1[14] = "Dallas";strcat(s1, s2);cout << s1A. DallasB. DallasDallasC. DD. DD
题目7单选题
What will be displayed by the following code?char s2[7] = "Dallas";char s1[14] = "Dallas";cout << strcmp(s1, s2)A. 1B. 0C. -1D. 2
题目8单选题
Are the following two declarations the same?char city[8] = "Dallas";char city[ ] = "Dallas"A. yesB. no
题目9单选题
Suppose you declarechar city[7] = "ABCDEF";How many characters are stored in cityA. 5B. 6C. 7D. 8
题目10单选题
Show the output of the following code:char city[7] = "Dallas";cout << strlen(city)A. 5B. 6C. 7D. 8
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