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Because there are only three situations, three judgments are enough;

The code is as follows:

Floating x;

float y = 0.0

int k;

Printf ("Please enter a

Write y = x (x

Because there are only three situations, three judgments are enough;

The code is as follows:

Floating x;

float y = 0.0

int k;

Printf ("Please enter a

Write y = x (x

Because there are only three situations, three judgments are enough;

The code is as follows:

Floating x;

float y = 0.0

int k;

Printf ("Please enter a floating point number! \ n ");

scanf("%f ",& ampx);

if(x & lt; 1)k = 0;

else if(x & gt; = 1。 & ampx & lt 10)k = 1;

else if(x & gt; 10)k = 2;

Switch (k)

{

Case 0: y = x; Break;

Case1:y = 2 * x-1; Break;

Case 2: y = 3 * x-11; Break;

}

printf("y=%f ",y);