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  1. #include<stdio.h>
  2. #include<string.h>
  3. #include<stdlib.h>
  4.  
  5. float c2f(float);
  6. float f2c(float);
  7.  
  8. float Fahrenheit,Celsius;
  9.  
  10. int main(int argc, char *argv[])
  11. {
  12.  
  13. /** 
  14.  * Check for the expected number of arguments (3)
  15.  * (0) program name
  16.  * (1) flag
  17.  * (2) temperature
  18.  */
  19. if (argc!=3)
  20. {
  21.     printf("Incorrect number of arguments\n");
  22.     exit(0);
  23. }
  24.  
  25. if (!strcmp(argv[1], "toF"))
  26. {
  27.    // convert the string into a floating number
  28.    char *check;
  29.    float Celsius = strtod(argv[2], &check);
  30.  
  31.     if (Celsius < -273.15)
  32.    {
  33.    printf("ERROR! The temperature is below absolute zero.");
  34.    }
  35.  
  36. // process from celsius to fahrenheit
  37.    Fahrenheit = c2f(Celsius);
  38.    printf("%5.2f°C = %5.2f°F\n",Celsius, Fahrenheit);
  39. }   
  40. else if (!strcmp(argv[1], "toC"))
  41. {
  42.    // convert the string into a floating number
  43.    char *check;
  44.    float Fahrenheit = strtod(argv[2], &check);
  45.  
  46.    // process from fahrenheit to celsius
  47.    Celsius = f2c(Fahrenheit);
  48.    printf("%5.2f°F = %5.2f°C\n", Fahrenheit, Celsius);
  49. }
  50.  
  51. else 
  52. {
  53.  
  54.    printf("Invalid flag\n");
  55. }
  56. } // main
  57.  
  58.  
  59. float c2f(float c)
  60. {
  61.   return 32 + (c * (180.0 / 100.0)); 
  62. } 
  63.  
  64. float f2c(float f)
  65. {
  66.   return (100.0 / 180.0) * (f - 32);
  67. }
Success #stdin #stdout 0s 2248KB
comments (?)
stdin
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Standard input is empty
stdout
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Incorrect number of arguments
https://ideone.com/Ej9iJ8
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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