[C] Lấy Phần Thập Phân và Số Tự Nhiên

#include "stdio.h"
#include "string.h"

int main(void) {
    char charNumber[30], resultSoNguyen[30], resultThapPhan[30];
    int iLoop, iLength, iResult, iForThapPhan;

    printf("Nhap vao mot so thap phan: ");
    scanf("%s", charNumber);

    iLength = (int) strlen(charNumber);

    for (iLoop = 0; iLoop < iLength; iLoop++) {
        resultSoNguyen[iLoop] = charNumber[iLoop];
        if (charNumber[iLoop + 1] == ',') {
            iResult = iLoop;
            break;
        }
        if (charNumber[iLoop + 1] == '\0') {
            iResult = iLoop;
            break;
        }
    }
    resultSoNguyen[iResult + 1] = '\0';

    iForThapPhan = 0;
    for (iLoop = iResult + 2; iLoop < iLength; iLoop++) {
        resultThapPhan[iForThapPhan] = charNumber[iLoop];
        iForThapPhan++;
    }

    resultThapPhan[iForThapPhan] = '\0';

    if ((int)strlen(resultThapPhan) == 0) {
        resultThapPhan[0] = '0';
        resultThapPhan[1] = '\0';
    }

    printf("So nguyen la: %s.\nPhan thap phan la: %s.\n", resultSoNguyen, resultThapPhan);

    return 0;
}