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  1. #include <stdio.h>
  2. #include <string.h>
  3. #include <ctype.h>
  4.  
  5. typedef struct {
  6.     char simbol[3];
  7.     int jumlah;
  8. } Unsur;
  9.  
  10. int main() {
  11.     char senyawa[256];
  12.     printf("Masukkan senyawa kimia: ");
  13.     scanf("%s", senyawa); // baca satu string senyawa
  14.  
  15.     Unsur unsur[100];
  16.     int count = 0, n = strlen(senyawa);
  17.  
  18.     for (int i = 0; i < n; ) {
  19.         if (isupper(senyawa[i])) {
  20.             char simbol[3] = {senyawa[i++], 0, 0};
  21.             if (i < n && islower(senyawa[i])) simbol[1] = senyawa[i++];
  22.  
  23.             int jumlah = 0;
  24.             while (i < n && isdigit(senyawa[i])) 
  25.                 jumlah = jumlah * 10 + (senyawa[i++] - '0');
  26.             if (jumlah == 0) jumlah = 1;
  27.  
  28.             // Gabungkan jika unsur sudah ada
  29.             int ada = 0;
  30.             for (int j = 0; j < count; j++) {
  31.                 if (strcmp(unsur[j].simbol, simbol) == 0) {
  32.                     unsur[j].jumlah += jumlah;
  33.                     ada = 1;
  34.                     break;
  35.                 }
  36.             }
  37.             if (!ada) {
  38.                 strcpy(unsur[count].simbol, simbol);
  39.                 unsur[count++].jumlah = jumlah;
  40.             }
  41.         } else i++;
  42.     }
  43.  
  44.     for (int i = 0; i < count; i++)
  45.         printf("%s %d\n", unsur[i].simbol, unsur[i].jumlah);
  46.  
  47.     return 0;
  48. }
  49.  
Success #stdin #stdout 0.01s 5324KB
comments (?)
stdin 
2H2O1
stdout 
Masukkan senyawa kimia: H 2
O 1
https://ideone.com/NKpnXT
language:
C (gcc 8.3)
created:
14 days ago
visibility:
public

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