[求助]请高手指教

没有声明！把==写成了=号！应该注意！我是学JAVA的来这逛逛

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谢谢我知道哪错了

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#include <stdio.h>
void main()
{
int a,b;
printf("Please Input number a&b :");
scanf("%d%d",&a,&b);
if (b-a==b || a-b==b)
printf("Difference is equal to value %d\n",b);
else if (b-a==a || a-b==a)
printf("Difference is equal to value %d\n",a);
else
printf("difference is hotequal to any of the values entered\n");
}

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