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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4. #include <math.h>
  5.  
  6.  
  7. int main(int argc, char *argv[])
  8. {
  9.   float valueOne;
  10.   float valueTwo;
  11.   char operator;
  12.   float answer;
  13.  
  14.   printf("Enter calculation:\n\n");
  15.   scanf("%f %c %f", &valueOne, &operator, & valueTwo);
  16.  
  17.   switch(operator)
  18.     {
  19.     case '/': answer = valueOne/valueTwo;
  20.       break;
  21.     case '*': answer = valueOne*valueTwo;
  22.       break;
  23.     case '+': answer = valueOne+valueTwo;
  24.       break;
  25.     case '-': answer = valueOne-valueTwo;
  26.       break;
  27.     case '^': answer = pow(valueOne,valueTwo);
  28.       break;
  29.     case ' ': answer = sqrt(valueTwo);
  30.       break;
  31.     default: goto fail;
  32.     }
  33.   printf("%.9g%c%.9g =  %.6g\n\n",valueOne,operator, valueTwo, answer);
  34.   goto exit;
  35.  fail:
  36.   printf("Fail.\n");
  37.  exit:
  38.   return 0;
  39. }
Success #stdin #stdout 0.01s 5388KB
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stdin
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Standard input is empty
stdout
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Enter calculation:

Fail.
https://ideone.com/ZFvt3P
language:
C (gcc 8.3)
created:
1 year ago
visibility:
public

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