1. 记录时间
#include <atlstr.h>
#include <time.h>
clock_t clockBegin, clockEnd;
clockBegin = clock();
// do sth.
clockEnd = clock();
double totaltime = (double)(clockEnd-clockBegin)/CLOCKS_PER_SEC;
//输出时间是s
CString csTemp;
csTemp.Format("%f", totaltime);
OutputDebugString(csTemp);
2. 报错
error C2664: 'void ATL::CStringT<BaseType,StringTraits>::Format (...)
解决
csTemp.Format(_T("%f"), totaltime);