C语言编程实例分析与解答【具体示例包含不重复数字组合】

The given programming example is a simple C program that looks to determine how many unique, non-repeating three-digit numbers can be formed using the digits 1, 2, 3, and 4. The program follows a straightforward logic to iterate through all possible combinations of the digits and remove those that do not meet the specified criteria. The program starts with defining three integer variables, i, j, and k, to represent the hundreds, tens, and ones places of the three-digit number, respectively. It then uses three nested for-loops to iterate through all possible combinations of these four digits. Within the innermost loop, the program checks whether the values of i, j, and k are all different, ensuring that the resulting three-digit number is unique with no repeating digits. Once all combinations have been generated, the program prints the total count of unique three-digit numbers meeting the criteria, as well as the individual numbers themselves. The program is relatively simple and clearly illustrates the fundamental concepts of nested loops and conditional statements in C programming. It demonstrates how to efficiently solve a combinatorial problem through systematic iteration and filtering. Overall, the program serves as a good example of how to approach similar problems in C programming and can be used as a reference for beginners to understand the basics of nested loops, if statements, and printing output in C. In conclusion, the given C programming example successfully solves the problem at hand and provides valuable insight into the process of iteration and evaluation of multiple combinations. It serves as a useful learning tool for beginners and an example of how to manipulate and handle multiple variables using nested loops.