#include<stdio.h>
void main()
{
    int i;
    clrscr();

    printf("-------------------------\n");
    printf("i=1.\tEnter data\n",i);
    printf("i=2.\tData processing\n",i);
    printf("i=3.\tEnd\n",i);
    printf("-------------------------\n");

    scanf("i=d%\n",&i);

    if(i=1)
        printf("Enter data...\n");
    else if(i=2)
        printf("Data processing...\n");
    else if(i=3)
        printf("The end.\n");
    else
        printf("Error\n");
}
这个程序怎么运行的很奇怪呀？