qsort
语法:
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#include <stdlib.h> void qsort( void *buf, size_t num, size_t size, int (*compare)(const void *, const void *) ); |
功能: 对buf 指向的数据(包含num 项,每项的大小为size)进行快速排序。如果函数compare 的第一个参数小于第二个参数,返回负值;如果等于返回零值;如果大于返回正值。函数对buf 指向的数据按升序排序。
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