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  1. #include<stdio.h>
  2. #include<string.h>
  3. #define MAXN 500+2
  4.  
  5. char line1[MAXN];
  6. double num[2] = {0.0, 0.0};
  7. char unit[2] = {'0', '0'};
  8. char prefix[2] = {'0', '0'};
  9.  
  10. void dataProcess(char unit1, double num1, char unit2, double num2)
  11. {
  12.         if(unit1 == 'W' && unit2 == 'V')
  13.       printf("I=%.2lfA\n", (1.0 * num1) / (1.0 * num2));
  14.         else if(unit1 == 'V' && unit2 == 'W')
  15.       printf("I=%.2lfA\n", (1.0 * num2) / (1.0 * num1));
  16.         else if(unit1 == 'W' && unit2 == 'A')
  17.       printf("U=%.2lfV\n", (1.0 * num1) / (1.0 * num2));
  18.         else if(unit1 == 'A' && unit2 == 'W')
  19.       printf("U=%.2lfV\n", (1.0 * num2) / (1.0 * num1));
  20.         else
  21.       printf("P=%.2lfW\n", 1.0 * num1 * num2);
  22. }
  23.  
  24. double conversion(double num, char prefix)
  25. {
  26.    switch(prefix){
  27.       case 'm':
  28.          num *= 0.001;
  29.       case 'k':
  30.          num *= 1000;
  31.       case 'M':
  32.          num *= 1000000;
  33.    }
  34.    return num;
  35. }
  36.  
  37. int main()
  38. {
  39.    int nTest = 0;
  40.    int i = 0, j = 1;
  41.    scanf("%d", &nTest);
  42.    getchar();
  43.    while(nTest--){
  44.       i = 0;
  45.       memset(num, 0.0, sizeof(num));
  46.       memset(unit, 0, sizeof(unit));
  47.       memset(prefix, 0.0, sizeof(prefix));
  48.  
  49.       fgets(line1, MAXN, stdin);
  50.  
  51.       char * pch;
  52.       pch = strpbrk (line1, "=");
  53.       while (pch != NULL)
  54.       {
  55.          if(unit[i] == 'm'|'k'|'M'){
  56.             sscanf(pch+1, "%lf %[mkM] %[VAW]", &num[i], &prefix[i], &unit[i]);
  57.             num[i] =  conversion(num[i], prefix[i]);
  58.          }
  59.          pch = strpbrk (pch+1,"=");
  60.          i++;
  61.       }
  62.  
  63.       printf("Problem #%d\n", j++);
  64.       dataProcess(unit[0], num[0], unit[1], num[1]);
  65.       if(nTest)
  66.          printf("\n");
  67.  
  68.    }
  69.  
  70.    return 0;
  71. }
  72.  
Success #stdin #stdout 0s 2900KB
comments (?)
stdin
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3
If the voltage is U=200V and the current is I=4.5A, which power is generated?
A light-bulb yields P=100W and the voltage is U=220V. Compute the current, please.
bla bla bla lightning strike I=2A bla bla bla P=2.5MW bla bla voltage?
stdout
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Problem #1
P=900.00W

Problem #2
P=22000.00W

Problem #3
P=5000000.00W
https://ideone.com/kHaBHL
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
secret

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