---
# System prepended metadata

title: C語言題庫-055

---

# C語言題庫-055
```
int modifyvalue()
{
return(x+=10);
}
int c hangevalue(int x )
{
return(x+=1);
}
void m ain()
{
int x =10;
x++;
changevalue(x);
x++;
modifyvalue();
printf(“First output:%dn”,x);
x++;
changevalue(x);
printf(“Second output:%dn”,x);
modifyvalue();
printf(“Thirdoutput:%dn”,x);
}
```
輸出?
【標準答案】12、13、13
