error: #268: declaration may not appear after executabl statement in block

小白的問題：stm32用keil4編譯時出現：error:  #268: declaration may not appear after executabl statement in block

        出現這個錯誤的原因在於C語言關於變量的定義只能放在函數的開頭，應該放在執行語句的前面定義，纔不會出錯~

例如函數void TIM_Config(void)
{
         TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;


TIM_DeInit(TIM2);
TIM_InternalClockConfig(TIM2);

TIM_TimeBaseStructure.TIM_Prescaler=36000;
TIM_TimeBaseStructure.TIM_Period=65535;
TIM_TimeBaseStructure.TIM_ClockDivision=0x0;
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure);

TIM_OCInitTypeDef       TIM_OCInitStructure;
TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_Timing;
TIM_OCInitStructure.TIM_Pulse=2000;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;
TIM_OC1Init(TIM2,&TIM_OCInitStructure);
TIM_OC1PreloadConfig(TIM2,TIM_OCPreload_Disable);

}

這樣編譯就會出現上面所說的錯誤，應該把TIM_OCInitTypeDef       TIM_OCInitStructure;這個語句放在函數開頭，即可解決；