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C6657 时间问题



 如图所示。对主程序进行计数,结果运行正确,但是计时为0.

使用的计时方法为

#include <c6x.h>

#include <time.h>

clock_t  t_overhead, t_start, t_stop, t_opt;

t_start = _itoll(TSCH, TSCL );

(要评估的函数);

t_stop = _itoll(TSCH, TSCL);

t_overhead = t_stop - t_start;