int i = 119; float f = 119.119; double d = 110.110; CString str; str.Format("int:%d float:%.4f double:%.4f", i, f, d); AfxMessageBox(str);
CString num;int a=1;float b=2;num.Format(\"%d\",a);//由int转换num.Format(\"%f\",b); //由float转换