tri.c

linux下的Ｃ语言开发

/*-*/
/********************************************************
 * Question:						*
 *	This is designed to compute the area of 	*
 *      a triangle, given its width and height.		*
 *							*
 * For some strange reason, the compiler refuses to 	*
 * believe that we declared the variable "width".	*
 *							*
 * The declaration is right there on line 16,	 	*
 * just after the definition of height.  		*
 * Why isn't the compiler seeing it?			*
 ********************************************************/
/*+*/
#include <stdio.h>
char line[100];/* line of input data */
int  height;   /* the height of the triangle
int  width;    /* the width of the triangle */
int  area;     /* area of the triangle (computed) */

int main()
{
    printf("Enter width height? ");

    fgets(line, sizeof(line), stdin);
    sscanf(line, "%d %d", &width, &height);

    area = (width * height) / 2;
    printf("The area is %d\n", area);
    return (0);
}