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我尝试使用strncmp,但它只有在我给它一个特定数量的字节我想要提取时才有效.

char line[256] = This "is" an example. //I want to extract "is"
char line[256] = This is "also" an example. // I want to extract "also"
char line[256] = This is the final "example".  // I want to extract "example"
char substring[256]

我如何提取""之间的所有元素？并把它放在变量substring？