[C] Get number of 's', find word that has max length.

// Nhap vao mot chuoi:
// In ra so chu 's' xuat hien trong chuoi
// In ra tu trong chuoi co do dai lon nhat

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

int getNumberOfChar(char *input, char charlet);
void setTextForArray(char *input, int start, int end, char *output);

int main(void) {
    char inputString[30];
    printf("Nhap vao mot chuoi: ");
    gets(inputString);

    // Lay do day chuoi inputString - facebook.com/dinophanhk
    int lengthOfInputString = (int) strlen(inputString);

    // Lay so tu trong inputString
    int numberOfElements = 0;
    for (int i = 0; i < lengthOfInputString; i++) {
        if (inputString[i] == ' ') {
            numberOfElements ++;
        }
    }

    // Tao so phan tu cho mang result
    char result[numberOfElements][30];
    int iStart, iTemp = 0, iEnd;

    iStart = 0;
    for (int i = 0; i <= lengthOfInputString; i++) {
        if (inputString[i] == ' ' || inputString[i] == '\0') {
            iEnd = i;
            setTextForArray(inputString, iStart, iEnd - 1, result[iTemp]);
            iTemp ++;
        }
        if (inputString[i - 1] == ' ') {
            iStart = i;
        }
    }


    // Lay ra tu dai nhat
    int iMax = 0, iPos = 0;
    for (int i = 0; i <= numberOfElements; i++) {
        if (iMax < (int) strlen(result[i])) {
            iMax = (int) strlen(result[i]);
            iPos = i;
        }
    }

    int iMin = 30, iPos2 = 0;
    for (int i = 0; i <= numberOfElements; i++) {
        if (iMin > (int) strlen(result[i])) {
            iMin = (int) strlen(result[i]);
            iPos2 = i;
        }
    }

    printf("So tu 's' xuat hien trong chuoi: %d.\n", getNumberOfChar(inputString, 's'));
    printf("Tu dai nhat la: %s.\n", result[iPos]);
    printf("Tu ngan nhat la: %s.\n", result[iPos2]);

    return 0;
}

int getNumberOfChar(char *input, char charlet) {
    int length = (int) strlen(input), iCount = 0;
    for (int i = 0; i < length; i++) {
        if (input[i] == charlet) {
            iCount++;
        }
    }
    return iCount;
}
void setTextForArray(char *input, int start, int end, char *output) {
    int temp;
    temp = 0;
    for (int i = start; i <= end; i++) {
        output[temp] = input[i];
        temp ++;
    }
    output[temp] = '\0';
}