从TXT阵列在C（长数字） [英] arrays from txt in c (long numbers)

问题描述

4000亿; 499999999999; VISA;

400000000000;499999999999;VISA;

5000; 59999999; MASTERCARD;

50000000;59999999;MASTERCARD;

6700; 67999999; MAESTRO;

67000000;67999999;MAESTRO;

字段：1.范围开始2.范围结束，3名

fields: 1. Range Start 2. Range End, 3 Name.

[开始范围]和[结束范围]字段可以由长度为1至16个字符（数字）。

[Start Range] and [End Range] fields can be from 1 to 16 characters (digits) in length.

该计划的目标如下：

第一次请求输入16位卡号。

First Request to enter 16-digit card number.

 Card number input, verification and processing use char [n] type (Simbol array)

二：检查可以在文本文件中找到对应输入卡号的条目，如果我进入450亿是4000亿和499999999999之间，所以我需要把一个文本在autput名签证。
我不能用很长很长......类型，因为我undrstand我需要使用数组...
第三请求，要求其格式为nnnn.mm，其中NNNN-1至4位数字金额拉特，但是毫米输入金额 - 2位量santims

Second:Check for an entry corresponding to the entered card number can be found in a text file if I enter 45000000000 it's between 400000000000 and 499999999999 so i need to put a text in a autput name VISA. And i can't use long long types... as i undrstand i need to use arrays... Third Request to enter the amount in the format "nnnn.mm", where nnnn-1 to 4 digits long amount of lats, but mm - 2-digit amount santims.

char input[32]; // = "100;200;first";
char name[10];
int min, max, c, i, k;

FILE *file;
file = fopen("gg.txt","r");

i=0;

while ((c=getc(file))!= EOF)
{
    k=(int)c;
    input[i]=k;
    i++;
}

char* result = NULL;
char delims[] = ";";

result = strtok(input, delims);

// atoi() converts ascii to integer.
min = atoi(result);
result = strtok(NULL, delims);
max = atoi(result);

result = strtok(NULL, delims);

strcpy(name, result);

printf("Min=%d, Max=%d, Name=%s\n", min, max, name);
printf("input=%s\n",input);
printf("%d\n",i);

getch();
return 0;

这code。通过varunl给了我工作的圣维特SMaL公司数量（包含gg.txt文件为：100; 200;第一），但需要其他的SMT，enybody，能不能帮我。

this code given me by varunl works vith smal numbers ( the containing of gg.txt file is: 100;200;first), but a need smt else, enybody, can help me?

推荐答案

诀窍是在填充的号码16位数，所以你可以为字符串比较它们。所以，如果你这样说的：

The trick is in padding the numbers to 16 digits, so you can compare them as strings. So if you read this:

67000000;67999999;MAESTRO;

在现实中，你不得不考虑这样的：

in reality you have to consider it like this:

0000000067000000;0000000067999999;MAESTRO;

同为用户的输入。

The same for the user input.

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

void FindCCType(const char *pnumber);

int main(int argc, char *argv[])
{
    FindCCType("67000001");
    return 0;
}

#define MAXLENGTH 16

char* PadLeft(const char *pnumber)
{
    char *pnumber2 = (char*)malloc(MAXLENGTH + 1);
    size_t len = strlen(pnumber);

    if (len > MAXLENGTH)
    {
        /* Too many digits in credit card number */
        exit(1);
    }

    strcpy(pnumber2 + MAXLENGTH - len, pnumber);

    char *pbegin = pnumber2, *plast = pnumber2 + MAXLENGTH - len;

    while (pbegin < plast)
    {
        *pbegin = '0';
        pbegin++;
    }

    return pnumber2;
}

void FindCCType(const char *pnumber)
{
    printf("Input: %s\n", pnumber);

    char *pnumber2 = PadLeft(pnumber);

    FILE *file = fopen("gg.txt","r");

    char pline[1000];

    while (fgets(pline, sizeof(pline), file) != NULL)
    {
        if (strlen(pline) + 1 == sizeof(pline)) 
        {
            /* Line too much long */
            exit(2);
        }

        char *pmin = strtok(pline, ";");
        char *pmax = strtok(NULL, ";");
        char *pname = strtok(NULL, ";");

        printf("Min: %s, Max: %s, Name: %s", pmin, pmax, pname);

        char *pmin2 = PadLeft(pmin);
        char *pmax2 = PadLeft(pmax);

        if (strcmp(pnumber2, pmin2) >= 0 && strcmp(pnumber2, pmax2) <= 0)
        {
            printf(" ** FOUND **\n");

            free(pmin2);
            free(pmax2);
            break;
        }

        printf(" ** NO GOOD **\n");

        free(pmin2);
        free(pmax2);
    }

    fclose(file);
    free(pnumber2);
}

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