用sprintf老报错

只看该作者 · 2016-7-13 19:23

用sprintf老报错一般是啥原因

1万 · 2016-7-13 19:27

程序呢

只看该作者 · 2016-7-13 19:29

#include <project.h>

int main()
{
/* Place your initialization/startup code here (e.g. MyInst_Start()) */
int16 res;
float vol;
int16 value;
char tstr;
ADC1_Start();
LCD1_Start();
LCD1_ClearDisplay();
ADC1_StartConvert();
LCD1_Position(0,0);
LCD1_Position(1,8);
for(;;)
{
   while(ADC1_IsEndConversion(ADC1_WAIT_FOR_RESULT)==0);
   res=ADC1_GetResult16();
   vol=ADC1_CountsTo_Volts(res);
   sprintf(tstr,"%+1.4f",vol);
   value=(int)80*vol/5.0;
   if(Pin_2_Read()==0)
   {
      LCD1_Position(0,0);
      LCD1_PrintString("Measured Voltage is:");
      LCD1_Position(1,0);
      LCD1_PrintString(tstr);
      LCD1_PrintString(" V             ");
   }
else
      LCD1_DrawHorizontalBG(1,0,80,value);
/* Place your application code here. */
}
}

/* [] END OF FILE */

1万 · 2016-7-13 19:36

是不是缺少包含的头文件？？

只看该作者 · 2016-7-13 19:39

默认不为0吗