張正賢教學網站 | 0926- scanf ( ) an integer number

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選修分組-專題 / 選手訓練 / 0926- scanf ( ) an integer number

int scanf_int( char *str1 ); //函數原型宣告

//----------------------------------------------------------------

void setup ()

{

Serial.begin( 115200 );

while ( !Serial ); //wait for UART ready

Serial.println("Hello World!\n");

}

char buf[128]; //for sprinf() function

void loop()

{

int a = scanf_int ( "Input a number:" );

sprintf( buf, "\n value= %d", a );

Serial.println( buf );

}

int scanf_int( char *str1 ) {

String str = "";

int a = 0;

Serial.println( str1 );

while ( !Serial.available() );

if ( Serial.available() ) {

str = Serial.readString();

a = str.toInt();

}

return a;

}