我想从一串文本中解析整数:
"f 1/2/3 4/5/6 7/8/9"
成:
int arr1[3] = { 1, 4, 7 };
int arr2[3] = { 2, 5, 8 };
int arr3[3] = { 3, 6, 9 };
我编写了以下代码,根据字符串的一般格式使用sscanf_s
进行解析:
// line = "f 1/2/3 4/5/6 7/8/9"
int arr1[3], arr2[3], arr3[3];
sscanf_s(line.c_str(), "f %d/%d/%d %d/%d/%d %d/%d/%d",
&arr1[0], &arr2[0], &arr3[0],
&arr1[1], &arr2[1], &arr3[1],
&arr1[2], &arr2[2], &arr3[2]);
奇怪的是,运行此代码后我的数组内容是:
arr1 = { 4, 7, -858993460 };
arr2 = { 5, 8, -858993460 };
arr3 = { 6, 9, -858993460 };
这是一种奇怪的结果,它几乎就像正确地加载数据但是然后将数组向左移动一个。奇怪的是,sscanf_s
返回9
,表示它使用我传入的格式找到了9个匹配。我一直在尝试查找错误,但我真的看不出代码出错了。< / p>
答案 0 :(得分:0)
刚刚编译了这段代码:
#include <iostream>
#include <cstdio>
using namespace std;
int arr1[3], arr2[3], arr3[3];
int main()
{
std::string line = "f 1/2/3 4/5/6 7/8/9";
sscanf_s(line.c_str(), "f %d/%d/%d %d/%d/%d %d/%d/%d",
&arr1[0], &arr2[0], &arr3[0],
&arr1[1], &arr2[1], &arr3[1],
&arr1[2], &arr2[2], &arr3[2]);
std::cout << "arr1 : " << arr1[0] << ", " << arr1[1] << ", " << arr1[2] << std::endl;
std::cout << "arr2 : " << arr2[0] << ", " << arr2[1] << ", " << arr2[2] << std::endl;
std::cout << "arr3 : " << arr3[0] << ", " << arr3[1] << ", " << arr3[2] << std::endl;
}
它运作正常。