将字符串转换为整数有多种方法，取决于你使用的编程语言。以下是一些常见编程语言中转换字符串为整数的方法：
Python
```python
str_num = "123"
int_num = int(str_num)
```
JavaScript
```javascript
let strNum = "123";
let intNum = parseInt(strNum);
```
或者使用更现代的方法：
```javascript
let strNum = "123";
let intNum = +strNum;
```
Java
```java
String strNum = "123";
int intNum = Integer.parseInt(strNum);
```
C
```csharp
string strNum = "123";
int intNum = int.Parse(strNum);
```
C++
```cpp
include
include
std::string strNum = "123";
std::stringstream ss;
ss << strNum;
int intNum;
ss >> intNum;
```
这些示例展示了如何将字符串转换为整数。请根据你使用的编程语言选择相应的方法。
