error message/help with code.

error message , led messing code.

z:\arduino\voltage\voltage.ino: in function 'long int rgb(int, int, int)':

z:\arduino\voltage\voltage.ino:21:1: warning: no return statement in function returning non-void [-wreturn-type]

}

^

code below.

code: [select]


#define analog_in_ch1 0
#define analog_in_ch2 1
#define analog_in_ch3 2
const int rgbred  = 2;
const int rgbgrn  = 3;
const int rgbblu  = 4;
void setup(){
  serial.begin(19200);
  pinmode(analog_in_ch1,input);
  pinmode(analog_in_ch2,input);
  pinmode(analog_in_ch3,input);
  pinmode(rgbred,output);
  pinmode(rgbgrn,output);
  pinmode(rgbblu,output);
}
long rgb(int red, int green, int blue) {
  analogwrite(rgbred, (red));
  analogwrite(rgbgrn, (green));
  analogwrite(rgbblu, (blue));
}
void loop(){
  int val1 = analogread(analog_in_ch1);
  int val2 = analogread(analog_in_ch2);
  int val3 = analogread(analog_in_ch3);
  int cnt = 0;
  int v1 = map(val1,0,1023,0,5.0);
  int v2 = map(val2,0,1023,0,5.0);
  int v3 = map(val3,0,1023,0,5.0);
  if(v1 >= 4.8 || v1 == -1){cnt = cnt+1;}
  if(v2 >= 4.8 || v2 == -1){cnt = cnt+1;}
  if(v3 >= 4.8 || v3 == -1){cnt = cnt+1;}
  if(cnt == 0){
    rgb(255,0,0);
  }else if(cnt == 1){
    rgb(255,165,0);
  }else if(cnt == 2){
    rgb(255,255,0);
  }else if(cnt == 3){
    rgb(0,255,0);
  }
  //serial.print(cnt);
  serial.print('h'); /* unique header identify start of message */
  serial.print(",");
  serial.print(val1,dec);
  serial.print(",");
  serial.print(val2,dec);
  serial.print(",");
  serial.print(val3,dec);
  serial.print(",");  /* note comma sent after last field */
  serial.println();  /* send cr/lf */
  delay(90);
}


what im trying when 3 little caps reach @ 5 volts led suppose change colors each 1 gets full. blinking red green , repeat.

code: [select]

long rgb(int red, int green, int blue) {
  analogwrite(rgbred, (red));
  analogwrite(rgbgrn, (green));
  analogwrite(rgbblu, (blue));
}
you promised compiler you'd return value function., didn't.

pants on fire.

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