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  1.  #include <stdio.h>
  2.  
  3. /* This function will return a value of type float to any function */
  4. /* that calls it.       It will work for all integer or float values         */
  5. /* but the result returned will be in the format of float                 */
  6. float square   (float number)
  7. { 
  8.     float square_value;    /* a local variable to hold the result of the number being squared */
  9.  
  10.     /* square the number and store it in square_value */                      
  11.     square_value = number * number;  
  12.  
  13.     return (square_value);    /* return this value back to the function that called it */
  14.  
  15. }         
  16.  
  17. int main ()
  18. {
  19.  
  20.    float value1;   /* a local variable to hold a number to be entered */
  21.  
  22.    float answer;   /* a local variable that holds the value returned from the square function */
  23.  
  24.    /* Prompt the user for a number to be squared */
  25.    printf  ("\nEnter a number: ");
  26.    scanf ("%f", &value1);
  27.  
  28.    /* Pass value1 to the square function, process it and return the */
  29.    /* the squared value into the answer local variable */
  30.    answer = square ( value1 );
  31.  
  32.    printf ("\nThe square of %5.2f is %8.2f  \n",  value1, answer);
  33.  
  34.    return (0);
  35.  
  36. }
  37.  
  38.  
Success #stdin #stdout 0.01s 5288KB
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stdin
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5
stdout
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Enter a number: 
The square of  5.00 is    25.00
https://ideone.com/iGIhNi
language:
C (gcc 8.3)
created:
3 hours ago
visibility:
public

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