15

#define _CRT_SECURE_NO_WARNINGS
#include <string.h>
#include <stdio.h>

char* strInput();
char* substrRemove(unsigned int bgn, unsigned int end, char* str);

int main() {
    printf("String: ");
    char* str = strInput();
    printf("%s\n\n", str);
    int bgn, end;
    printf("Begin of substring: ");
    scanf("%d", &bgn);
    printf("End of substring: ");
    scanf("%d", &end);
    substrRemove(bgn, end, str);
    printf("%s", str);
}

char* strInput() {
    char ch;
    int len = 1;
    char* str = (char*)malloc(len * sizeof(char));
    str[0] = '\0';
    while ((ch = getchar()) != '\0' &&
            ch != '\n') {
        str = (char*)realloc(str, (len++) * sizeof(char));
        str[len - 1] = '\0';
        str[len - 2] = ch;
    }
    return str;
}

char* substrRemove(unsigned int bgn, unsigned int end, char* str) {
    int len = 0;
    do { ++len; } while (str[len] != '\0');
    if (end > len) end = len;
    for (int i = 0; bgn + i < len; ++i) str[bgn + i] = str[end + i];
    return str;
}