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double x[5]=2.0, 4.0, 6.0, 8.0, 10.0; int y[5]=0, 1, 3, 5, 7, 9; char c1[]='1', '2', '3', '4', '5'; char c2[]='/x10', '/xa', '/x8';
{x|x≤1} {x|1≤x<2} {x|0<x≤1} {x|0<x<1}
double x[5] =2.0,4.0,6.0,8.0,10.0; int y[5] =0,1,3,5,7,9; char c 1[ ] ='1','2','3','4','5'; char c 2 [C] =,'/x10','/xa','/x8';
double x[5]=2.0,4.0,6.0,8.0,10.0; int y[5]=0,1,3,5,7,9; char cl[]='1','2','3','4','5'; char c2[]='/x10','/xa','/x8';
double x[5]=2.0,4.0,6.0,8.0,10.0; int y[5.3]=0,1,3,5,7,9; charc/[]='1','2','3','4','5'; char c2[]='/x10','/xa','/x8';
double x[5]={2.0,4.0,6.0,8.0,10.0}; int y[5]={0,1,3,5,7,9}; char c1[]={'1','2','3','4','5'}; char c2[]={'/x10','/xa','/x8'};
(-2,2) (1,2) -1,0,1 -2,-1,0,1,2
(-∞,0)∪(10,+∞) (-1,+∞) (-∞,-2)∪(-1,10) (0,10)
y≥90xa+10x y≤20xa+5x y≥20xa+5x y≥100xa+10x
double x[5]=2.0,4.0,6.0,8.0,10.0; int y[5]=0,1,3,5,7,9; char c1[]=‘1’,’2’,’3’,’4’,’5’; char c2[]=‘/x10’,’/xa’,’/x8’;
double x[5]=2.0,4.0,6.0,8.0,10.0; int y[5.3]=0,1,3,5,7,9; char c1[]='1','2','3','4','5'; char c2[]='/x10','/xa','/x8';
double x[5] ={2.0,4.0,6.0,8.0,10.0}; int y[5] ={0,1,3,5,7,9}; char c 1[ ] ={'1','2','3','4','5'}; char c 2 ={,'/x10','/xa','/x8'};