Can not open source input file "mbed.h": No such file or directory (E5) Location: Line: 1 Col: 17

1. include "mbed.h" Serial pc(USBTX,USBRX); tx, rx DigitalOut myled(LED1); DigitalOut myled(LED2); DigitalOut myled(LED3); DigitalOut myled(LED4);

PwmOut led(LED1); PwmOut led(LED2); PwmOut led(LED3); PwmOut led(LED4);

float brightness = 0.0;

int main() { pc.printf("Welcome, Mr. Mbed is ready to blink.\n"); while(1) { char c = pc.getc(); if ((c == "u" && brightness < 0.5)) { brightness = brightness += 0.1; led = brightness; }

if ((c == "d" && brightness > 0.5)) { brightness = brightnes -= 0.1; led = brightness; } myled = 1; wait(0.2); myled = 0; wait(0.2); myled1 = 1; wait(0.2); myled1 = 0; wait(0.2); myled2 = 1; wait(0.2); myled2 = 0; wait(0.2); myled3 = 1; wait(0.2); myled3 = 0; wait(0.2);

} }