"[25,28] => 34"

我写了一个小程序来测试它：

#include <cstdlib>
#include <iostream>

int main() {
        char* line = "[25,28] => 34";
        char a1[100],a2[100];
        int i;
        sscanf(line,"[%[^,],%[^\]] => %i",a1,a2,&i);
        std::cout << "a1 = " << a1 <<"\na2 = " << a2 << "\ni = "<<i <<"\n";
        return 0;
}

编译这给出了

warning: unknown escape sequence '\]'

和输出

a1 = 25
a2 = 28
i = -1073746244

如果我改成它

sscanf(line,%[^]] => %i",&i);

我没有得到编译器投诉但仍然

a1 = 25
a2 = 28
i = -1073746244

我知道问题出在第二个标记中,因为

sscanf(line,%[0123456789]] => %i",&i);

给

a1 = 25
a2 = 28
i = 34

但我想为第二个令牌使用终止条件.我怎么做？