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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4.  
  5. void main(void)
  6. {
  7.    int r = 3 ;
  8.    const float pi = 3.1416 ;
  9.    float area = pi * r * r ;
  10.    printf( "半徑為%d", r );
  11.    printf ("的圓面積為%f\n", area );
  12.    system ("pause");
  13. }
  14.  
Success #stdin #stdout #stderr 0s 9432KB
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stdin
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Standard input is empty
stdout
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半徑為3的圓面積為28.274399
stderr
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sh: 1: pause: not found
https://ideone.com/Y6eMxJ
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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