C++ 易错点集合

目标：用于记录编程易错点

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1. std::find_first_of

#include<iostream>
#include <string>
using namespace std;

int main()
{
    std::string first = "KD";
    std::string source = "KTABC";

    // 注意： idx = 0
    int idx = source.find_first_of(first);

    return 0;
}