Learn programming with Lao Ma by “leveling up and fighting monsters”! To support children’s learning journey for “Python Level 1”, we have compiled detailed teaching plans and after-class assignments, which are now fully included in 👉Python Examination Classroom. We hope these materials can provide substantial help to the children. Last updated: 2025.06.18 Python Level 1 … Read more
01 If there is an array int a[10];, the correct reference to the elements of the array a is A) a[10] B) a[3.5] C) a(5) D) a[10-10] Answer: D Explanation: For option A: Incorrect, the valid indices of the array are 0 to 9, a[10] is out of bounds and will lead to undefined behavior. … Read more
01 Read the following program: #include <stdio.h> main() { int i,j, m=55; for(i=1;i<=3;i++) for(j=3; j<=i; j++) m=m%j; printf(“%d\n “, m); } The output of the program is A) 0 B) 1 C) 2 D) 3 Answer: B Explanation: Brief 02 Read the following program: main() { int a=5,b=4,c=3,d=2; if(a>b>c) printf(“%d\n”,d); else if((c-1>=d)==1) printf(“%d\n”,d+1); else printf(“%d\n”,d+2); … Read more
01 Given that x, y, and t are all int type variables, after executing the statement: x=y=3; t=++x||++y; the value of y is ( ) A) Undefined value B) 4 C) 3 D) 2 Answer: C Explanation: The short-circuit characteristic of || (logical OR): If the expression on the left of || is true (non-zero), … Read more
This article summarizes many common problem types in C language, which can help everyone learn and review the basics of C language. If you have better solutions, feel free to leave a message!!!Reverse OrderOutput a given number in reverse order // Reverse output of an input integer #include <stdio.h> int main() { int i, a … Read more
C Language Exercise Analysis These problem-solving ideas will enlighten you✨ In the world of programming, C language is like a mysterious and challenging mountain. Whether you are a novice stepping into the programming door or a developer who has been swimming in the sea of code for a long time, you will always encounter various … Read more
Author: Yan Weimin, Wu Weimin, Mi Ning, Published by: Tsinghua University PressPublication Date: February 1999 Content Summary The content of the exercise section corresponds to the book “Data Structures” (C Language Version) and is divided into 12 chapters. Each chapter generally consists of five parts: basic content, learning points, algorithm demonstration content, basic knowledge questions, … Read more
1. Branch Control Statements 1.2 switch..case Statement 1.2.1 Format switch(expression){ case constant_expression1: code_block1; break; case constant_expression2: code_block2; break; case constant_expressionn: code_blockn; break; default: other_branch; break;} 1.2.2 Notes 1. The expression is generally a variable, which can also be a variable expression, and the constant expressions after case represent all possible values of this variable; 2. … Read more