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@ -13,36 +13,49 @@ float fetchBalanceFromBalanceString(char balance_String[MAX_LENGTH]) { |
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return balance; |
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return balance; |
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} |
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} |
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float getAvailableAccountBalance(int user_id) { |
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float readFileAndGetAvailableBalance(FILE *file, char stringID[MAX_LENGTH]) { |
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float balance = 0; |
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bool keep_reading = true; |
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bool keep_reading = true; |
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float availableBalance = 0; |
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char buffer[MAX_LENGTH]; |
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char buffer[MAX_LENGTH]; |
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char stringID[MAX_LENGTH] = "ID="; |
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char user_id_as_string[MAX_LENGTH]; |
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char balance_String[MAX_LENGTH]; |
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char balance_String[MAX_LENGTH]; |
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sprintf(user_id_as_string, "%d", user_id); // converts user_id to string |
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strcat(stringID, user_id_as_string); |
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FILE *file = fopen("CustomerData.txt", "r"); |
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while(keep_reading) { |
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while(keep_reading) { |
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fgets(buffer, MAX_LENGTH, file); |
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fgets(buffer, MAX_LENGTH, file); |
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if (feof(file)) { |
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if (feof(file)) { |
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keep_reading = false; |
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keep_reading = false; |
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} |
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} |
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else if(strstr(buffer, stringID)) { |
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else if(strstr(buffer, stringID)) { |
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for (int i = 0; i < 4; i++) { |
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fgets(buffer, MAX_LENGTH, file); |
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fgets(buffer, MAX_LENGTH, file); |
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fgets(buffer, MAX_LENGTH, file); |
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fgets(buffer, MAX_LENGTH, file); |
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fgets(buffer, MAX_LENGTH, file); |
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} |
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strcpy(balance_String, buffer); |
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strcpy(balance_String, buffer); |
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availableBalance = fetchBalanceFromBalanceString(balance_String); |
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balance = fetchBalanceFromBalanceString(balance_String); |
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keep_reading = false; |
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keep_reading = false; |
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} |
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} |
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} |
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} |
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return balance; |
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} |
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float getAvailableAccountBalance(int user_id) { |
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float availableBalance = 0; |
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char stringID[MAX_LENGTH] = "ID="; |
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char user_id_as_string[MAX_LENGTH]; |
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sprintf(user_id_as_string, "%d", user_id); // converts user_id to string |
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strcat(stringID, user_id_as_string); |
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// Now stringID is "ID=user_id" |
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FILE *file = fopen(CUSTOMER_DATA_FILE, "r"); |
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if(file == 0) { |
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printf("Error: customer data file cannot be opened!\n"); |
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return 0; |
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} |
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else { |
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availableBalance = readFileAndGetAvailableBalance(file, stringID); |
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} |
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fclose(file); |
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fclose(file); |
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return availableBalance; |
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return availableBalance; |
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