how to use a mma7361 accelerometer what is wrong?

Using Arduino Sensors
4

try this ...

#include <SoftwareSerial.h>

long axe_x=0;
long axe_y=0;
long axe_z=0;

void setup()
{
  Serial.begin(9600);
}

void loop()
{
  axe_x = (90* axe_x + 10 * analogRead(A0)) / 100;
  axe_y = (90* axe_y + 10 * analogRead(A1)) / 100;
  axe_z = (90* axe_z + 10 * analogRead(A2)) / 100;

  Serial.print(axe_x);
  Serial.print("\n");
  Serial.print(axe_y);
  Serial.print("\n");
  Serial.print(axe z);
 Serial.print("\n");
}