设计一个字符串函数reverses,它返回字符串s的反串,例如reverse("abc")返回("cba"
时间: 2023-12-02 09:57:43 浏览: 62
好的,以下是一个Python实现的reverses函数:
```python
def reverses(s):
return s[::-1]
```
这里使用了Python的切片操作,s[::-1]表示从后往前取字符串s的所有字符,步长为-1,也就是反向取。因此,函数返回的就是字符串s的反串。
相关问题
有一个3位数,请逆序输出它的各位数字的Python代码
Sure, here's the Python code to reverse the digits of a 3-digit number:
```
num = 123 # Replace with your desired 3-digit number
rev_num = int(str(num)[::-1])
print(rev_num)
```
This code first converts the input number (`num`) to a string, reverses it (`[::-1]`), and then converts it back to an integer. Finally, it prints the reversed number (`rev_num`).
c++ reverse
Sure! If you want to reverse a string in C, you can use the following code:
```c
#include <stdio.h>
#include <string.h>
void reverseString(char* str) {
int length = strlen(str);
int start = 0;
int end = length - 1;
while (start < end) {
char temp = str[start];
str[start] = str[end];
str[end] = temp;
start++;
end--;
}
}
int main() {
char str[] = "Hello, World!";
printf("Original string: %s\n", str);
reverseString(str);
printf("Reversed string: %s\n", str);
return 0;
}
```
This code defines a function `reverseString` that takes a character array (`str`) as input and reverses the string in-place. The `main` function demonstrates how to use this function by reversing the string "Hello, World!" and printing the result.
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