写出已知函数y={1 (x>0) ,0 (x=0) ,-1 (x

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写出已知函数y={1(x>0),0(x=0),-1(x写出已知函数y={1(x>0),0(x=0),-1(x写出已知函数y={1(x>0),0(x=0),-1(xintfun(intx){　inty;

写出已知函数y={1 (x>0) ,0 (x=0) ,-1 (x
写出已知函数y={1 (x>0) ,0 (x=0) ,-1 (x

写出已知函数y={1 (x>0) ,0 (x=0) ,-1 (x
int fun(int x)
{
　int y;
　if(x>0)
　　y=1;
　else if(x=0)
　　y=0;
　else if(x