请解释为什么程序 output 为 0（用 c 编程）

Question

Code: #include <stdio.h>

int main()
{
    int x;

    printf("%d\n",x);
    if(x>10)
      x-=10;
    else if(x>=0)
      x+=00;
    else if(x)
      x+=10;
    else
      x-=10;
      printf("%d\n",x);
    return 0;
}

Why initial value of x is zero? what is the default value of int, float, double, char type data in c. In this program x is assigned by default value or garbage value.

Answer 1

There is no default value in C. If a variable is uninitialized, it will have a random value. In your case it seems to be 0 but it could be anything.