数组函数定义多个继电器的

Question

if (relayState[1]) {

              RELAYS1_ON();
              RELAYS2_OFF();
              RELAYS3_OFF();
              RELAYS4_OFF();
              RELAYS5_OFF();
              RELAYS6_OFF();
          } else if (relayState[2]) {
              RELAYS1_OFF();
              HAL_Delay(100);
              RELAYS2_ON();
              RELAYS3_OFF();
              RELAYS4_OFF();
              RELAYS5_OFF();
              RELAYS6_OFF();
          } else if (relayState[3]) {
              RELAYS1_OFF();
              RELAYS2_OFF();
              HAL_Delay(100);
              RELAYS3_ON();
              RELAYS4_OFF();
              RELAYS5_OFF();
              RELAYS6_OFF();
          } else if (relayState[4]) {
              RELAYS1_OFF();
              RELAYS2_OFF();
              RELAYS3_OFF();
              HAL_Delay(100);
              RELAYS4_ON();
              RELAYS5_OFF();
              RELAYS6_OFF();
          } else if (relayState[5]) {
              RELAYS1_OFF();
              RELAYS2_OFF();
              RELAYS3_OFF();
              RELAYS4_OFF();
              HAL_Delay(100);
              RELAYS5_ON();
              RELAYS6_OFF();
          } else if (relayState[6]) {
              RELAYS1_OFF();
              RELAYS2_OFF();
              RELAYS3_OFF();
              RELAYS4_OFF();
              RELAYS5_OFF();
              HAL_Delay(100);
              RELAYS6_ON();
          }
  else if (relayState[0]) {
                RELAYS1_OFF();
                RELAYS2_OFF();
                RELAYS3_OFF();
                RELAYS4_OFF();
                RELAYS5_OFF();
                RELAYS6_OFF();
          }

怎么定义数组if (relayState[1]) {

              RELAYS1_ON();
              RELAYS2_OFF();
              RELAYS3_OFF();
              RELAYS4_OFF();
              RELAYS5_OFF();
              RELAYS6_OFF();
          } else if (relayState[2]) {
              RELAYS1_OFF();
              HAL_Delay(100);
              RELAYS2_ON();
              RELAYS3_OFF();
              RELAYS4_OFF();
              RELAYS5_OFF();
              RELAYS6_OFF();
          } else if (relayState[3]) {
              RELAYS1_OFF();
              RELAYS2_OFF();
              HAL_Delay(100);
              RELAYS3_ON();
              RELAYS4_OFF();
              RELAYS5_OFF();
              RELAYS6_OFF();
          } else if (relayState[4]) {
              RELAYS1_OFF();
              RELAYS2_OFF();
              RELAYS3_OFF();
              HAL_Delay(100);
              RELAYS4_ON();
              RELAYS5_OFF();
              RELAYS6_OFF();
          } else if (relayState[5]) {
              RELAYS1_OFF();
              RELAYS2_OFF();
              RELAYS3_OFF();
              RELAYS4_OFF();
              HAL_Delay(100);
              RELAYS5_ON();
              RELAYS6_OFF();
          } else if (relayState[6]) {
              RELAYS1_OFF();
              RELAYS2_OFF();
              RELAYS3_OFF();
              RELAYS4_OFF();
              RELAYS5_OFF();
              HAL_Delay(100);
              RELAYS6_ON();
          }
  else if (relayState[0]) {
                RELAYS1_OFF();
                RELAYS2_OFF();
                RELAYS3_OFF();
                RELAYS4_OFF();
                RELAYS5_OFF();
                RELAYS6_OFF();
          }

怎么定义数组，statement with no effect [-Wunused-value]
242 | relayState[0];显示警告

Answer 1

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警告"statement with no effect"是由于在代码中的某些地方尝试使用了数组元素，但没有进行任何实际操作。在数组定义或访问之后，加上等号并赋予具体的值即可解决警告。以下是修改后的代码示例：

if (relayState[1]) {
    RELAYS1_ON();
    RELAYS2_OFF();
    RELAYS3_OFF();
    RELAYS4_OFF();
    RELAYS5_OFF();
    RELAYS6_OFF();
} else if (relayState[2]) {
    RELAYS1_OFF();
    HAL_Delay(100);
    RELAYS2_ON();
    RELAYS3_OFF();
    RELAYS4_OFF();
    RELAYS5_OFF();
    RELAYS6_OFF();
} else if (relayState[3]) {
    RELAYS1_OFF();
    RELAYS2_OFF();
    HAL_Delay(100);
    RELAYS3_ON();
    RELAYS4_OFF();
    RELAYS5_OFF();
    RELAYS6_OFF();
} else if (relayState[4]) {
    RELAYS1_OFF();
    RELAYS2_OFF();
    RELAYS3_OFF();
    HAL_Delay(100);
    RELAYS4_ON();
    RELAYS5_OFF();
    RELAYS6_OFF();
} else if (relayState[5]) {
    RELAYS1_OFF();
    RELAYS2_OFF();
    RELAYS3_OFF();
    RELAYS4_OFF();
    HAL_Delay(100);
    RELAYS5_ON();
    RELAYS6_OFF();
} else if (relayState[6]) {
    RELAYS1_OFF();
    RELAYS2_OFF();
    RELAYS3_OFF();
    RELAYS4_OFF();
    RELAYS5_OFF();
    HAL_Delay(100);
    RELAYS6_ON();
} else if (relayState[0]) {
    RELAYS1_OFF();
    RELAYS2_OFF();
    RELAYS3_OFF();
    RELAYS4_OFF();
    RELAYS5_OFF();
    RELAYS6_OFF();
} else {
    // Handle the case when no relay state is true
}

请注意，最后添加了额外的else语句，以处理当没有任何继电器状态为true时的情况。这可以根据实际需求进行修改。