to_string报错,请修改以上代码
时间: 2024-09-18 15:11:06 浏览: 44
如果`std::to_string()`函数在C++中报错,可能是因为传给它的第二个参数不是有效的转换基础。对于八进制转换,这个参数应该是`std::base(8)`而不是`8`。下面是修正后的代码:
```cpp
#include <iostream>
#include <string>
#include <stack>
int main() {
int decimal_num = 3527;
std::string octal_str = std::to_string(decimal_num, std::base(8)); // 使用正确的八进制基础
std::stack<std::string> octal_stack;
octal_stack.push(octal_str); // 将字符串压入栈
std::cout << "八进制数: " << octal_str << "\n";
std::cout << "八进制数已压入栈: " << octal_stack.top() << "\n"; // 输出栈顶元素
return 0;
}
```
现在这段代码应该能正确地将十进制数转换为八进制并压入栈了。
相关问题
could not convert string to float: 'pm25_median'这句报错如何修改?
这个错误通常是由于尝试将字符串转换为浮点数时出现问题。要解决此问题,您需要检查代码中的字符串变量,并确保它们可以转换为浮点数。如果您确定变量是正确的数据类型,则可能需要检查数据本身是否存在问题。您可以尝试使用try-except语句来捕获此错误并进行处理。例如:
```python
try:
float_variable = float(string_variable)
except ValueError:
print("Could not convert string to float.")
```
这将尝试将字符串变量转换为浮点数。如果无法转换,则会引发ValueError,并输出一条错误消息。您可以根据需要修改此代码以适应您的情况。
int main() { std::map<std::string, std::string> config = readIniFile("config.ini"); int bluetoothCount = std::stoi(config["bluetooth.count"]); std::string logFileName = config["log.filename"]; WSADATA wsaData; int iResult = WSAStartup(MAKEWORD(2, 2), &wsaData); if (iResult != 0) { std::cout << "WSAStartup failed: " << iResult << std::endl; return 1; } WSAQUERYSET service; memset(&service, 0, sizeof(service)); service.dwSize = sizeof(service); service.dwNameSpace = NS_BTH; HANDLE lookupHandle = NULL; iResult = WSALookupServiceBegin(&service, LUP_CONTAINERS, &lookupHandle); if (iResult != 0) { std::cout << "WSALookupServiceBegin failed: " << iResult << std::endl; WSACleanup(); return 1; } int count = 0; while (count < bluetoothCount) { WSAQUERYSET result; memset(&result, 0, sizeof(result)); result.dwSize = sizeof(result); iResult = WSALookupServiceNext(lookupHandle, LUP_RETURN_NAME | LUP_RETURN_ADDR, &result); if (iResult != 0) { break; } count++; } WSALookupServiceEnd(lookupHandle); WSACleanup(); if (count >= bluetoothCount) { std::string logText = "Bluetooth count is " + std::to_string(count) + ", reached the target count of " + std::to_string(bluetoothCount); writeLogFile(logFileName, logText); } else { std::string logText = "Bluetooth count is " + std::to_string(count) + ", did not reach the target count of " + std::to_string(bluetoothCount); writeLogFile(logFileName, logText); } return 0; } &result报错,实参与形参不兼容 怎么修改
可以尝试将代码中的WSAQUERYSET result改为LPWSAQUERYSET result,即使用指向WSAQUERYSET结构体的指针类型,代码如下:
int main() {
std::map<std::string, std::string> config = readIniFile("config.ini");
int bluetoothCount = std::stoi(config["bluetooth.count"]);
std::string logFileName = config["log.filename"];
WSADATA wsaData;
int iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
if (iResult != 0) {
std::cout << "WSAStartup failed: " << iResult << std::endl;
return 1;
}
WSAQUERYSET service;
memset(&service, 0, sizeof(service));
service.dwSize = sizeof(service);
service.dwNameSpace = NS_BTH;
HANDLE lookupHandle = NULL;
iResult = WSALookupServiceBegin(&service, LUP_CONTAINERS, &lookupHandle);
if (iResult != 0) {
std::cout << "WSALookupServiceBegin failed: " << iResult << std::endl;
WSACleanup();
return 1;
}
int count = 0;
while (count < bluetoothCount) {
WSAQUERYSET* result;
memset(&result, 0, sizeof(result));
result->dwSize = sizeof(WSAQUERYSET);
iResult = WSALookupServiceNext(lookupHandle, LUP_RETURN_NAME | LUP_RETURN_ADDR, result);
if (iResult != 0) {
break;
}
count++;
}
WSALookupServiceEnd(lookupHandle);
WSACleanup();
if (count >= bluetoothCount) {
std::string logText = "Bluetooth count is " + std::to_string(count) + ", reached the target count of " + std::to_string(bluetoothCount);
writeLogFile(logFileName, logText);
}
else {
std::string logText = "Bluetooth count is " + std::to_string(count) + ", did not reach the target count of " + std::to_string(bluetoothCount);
writeLogFile(logFileName, logText);
}
return 0;
}
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