程序代码：

    int a = 90;
    static float b = 10.98f;
    public static void main(String args[])
    {
        float c = a + b;
        System.out.println("c =" +c);
    }

程序代码：

#include <stdio.h>

int main(void)
{
    int b = 4;
    static float a = 4;

    float c = a+b;
    printf("%f\n", c);

    return 0;
}

程序代码：

public class main {
    int a = 90;
    static float b = 10.98f;
    public static void main(String args[])
    {
        main s = new main();
        //float c = a + b;
        float c = s.a + s.b;
        System.out.println("c =" +c);
    }
}

程序代码：

    public static void main(String args[])
    {
        //main s = new main();
        float c = a + b;
        //float c = s.a + s.b;
        System.out.println("c =" +c);
    }

        float c(2);
        int d(2);

float []c = new float[3];

float c = new float(3);

程序代码：

        byte []buffer = new byte[100];
        int s = 0;
       
        try
        {
            System.out.println("输入一个字符串: ");
            s = System.in.read(buffer);
            String string = new String(buffer, 0, s);
            System.out.println(string);
            System.out.println(string.toUpperCase());
            System.out.println(string.toLowerCase());
        }
        catch (IOException e)
        {
        }