指出以下代码的错误:class M { void f(int x, int y){ int a = x; b = y; } int a,b; a = 1; }
时间: 2024-03-24 18:37:10 浏览: 20
以下是代码的错误:
1. 在类中定义函数时,应该在类体内定义并在类外部声明该函数。因此,应该将函数定义移动到类体内。
2. 在函数中,应该在变量 b 的前面加上关键字 `int`,以定义变量 b 的类型。
3. 在类中定义变量时,不能在类体外直接给变量赋值。因此,应该将赋值语句移动到构造函数中。
正确的代码如下:
```
class M {
public:
void f(int x, int y){
int a = x;
b = y;
}
M() {
a = 1;
}
private:
int a, b;
};
```
相关问题
class E{ int x; public void f(int n){ int m; int t=x+n; int y=x+m; m=10; y=x+m; } }
There is a syntax error in the code. The variable "m" is being used before it is declared. The corrected code is as follows:
class E{
int x;
public void f(int n){
int m = 0; // declare and initialize m
int t = x + n;
int y = x + m;
m = 10;
y = x + m;
}
}
class E{int x; public void f(int n){int m;int t=x+n;int y=x+m;m=10;y=x+m;}}
As an AI language model, I cannot say for certain what this code is supposed to do without more context. However, based on the code itself, it appears to define a class E with an integer field x and a public method f that takes an integer parameter n.
Inside the method f, there are three local variables defined: m, t, and y. The variable t is assigned the value of x plus n, while the variable m is assigned the value of 10. The variable y is then assigned the value of x plus m.
However, there is an issue with the variable y assignment. The variable m is being used before it is assigned a value, so it will have the default value of 0. Therefore, the value of y will be equal to x, which may not be the intended behavior.
It's also worth noting that the variable m is never used after it is assigned the value of 10, so it may be unnecessary.