我的C程序没有显示任何错误,但之后它没有运行

Question

这是按下ctrl + f9时没有显示任何错误的程序.它说按任意键继续,我这样做,然后它不运行我使用turbo c ++ 4.0,我已经保存了.c格式的文件请建议我应该做的更改来执行我的程序.

谢谢

# include <stdio.h>
# include <conio.h>

float main()
    {
    float l,b,r;
    float circ,area,arsq,peri;
    clrscr ();
    printf ("Enter the length of the rectangle: ");
    scanf ("%f", l);
    printf ("\nEnter the breadth of the rectangle: ");
    scanf ("%f", b);
    printf ("\nEnter the radius of the circle: ");
    scanf ("%f", r);
    peri = l+b+l+b;
    area = 3.14*r*r;
    arsq = l*b;
    circ = 3.14*2*r;

    printf ("\n\nThe perimeter of the rectangle is: %f",peri);
    printf ("\n\nThe area of the rectangle is: %f",arsq);
    printf ("\n\nThe circumfrence of the circle is: %f",circ);
    printf ("\n\nThe area of the circle is: %f",area);
    getch();
    return 0;
    }

Answer 1

更改

scanf ("%f", l);
scanf ("%f", b);
scanf ("%f", r);

至

scanf ("%f", &l);
scanf ("%f", &b);
scanf ("%f", &r);

正如%f那些人scanf期望变量(float*)的地址而不是它的值.

此外,main应按标准返回int,而不是a float.