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我有一个缓冲区,我正在做很多strncat.我想确保我永远不会溢出缓冲区大小.

char buff[64];

strcpy(buff, "String 1");

strncat(buff, "String 2", sizeof(buff));

strncat(buff, "String 3", sizeof(buff));

而不是sizeof(buff),我想说一些buff - xxx.我想确保我永远不会覆盖缓冲区