#include <stdio.h>
#include <string.h>
#include <ctype.h>
 
#define MAX_LEN 256
 
int main() {
    char str[MAX_LEN];
    int sum = 0;
    int current_number = 0;
    int in_number = 0;
 
    printf("Введіть рядок: ");
    fgets(str, MAX_LEN, stdin);
 
    int length = strlen(str);
 
    for (int i = 0; i < length; i++) {
        if (isdigit(str[i])) {
            current_number = current_number * 10 + (str[i] - '0');
            in_number = 1;
        } else {
            if (in_number) {
                sum += current_number;
                current_number = 0;
                in_number = 0;
            }
        }
    }
 
    if (in_number) {
        sum += current_number;
    }
 
    printf("Сума цілих чисел у рядку: %d\n", sum);
 
    return 0;
}

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

0L/QvtCz0L7QtNCwINC30LzRltC90LjQu9Cw0YHRjyDRgNGW0LfQutC+OiDQt9GA0LDQvdC60LAg0LHRg9C70L4gKzE1JmRlZztDLCDQsCDQstCy0LXRh9C10YDRliDRgtC10YDQvNC+0LzQtdGC0YAg0YPQttC1INC/0L7QutCw0LfRg9Cy0LDQsiAtMyZkZWc7Qywg0YLQvtCx0YLQviDRgNGW0LfQvdC40YbRjyDRgdC60LvQsNC70LAg0YbRltC70LjRhSAxOCDQs9GA0LDQtNGD0YHRltCyLgoK

погода змінилася різко: зранка було +15°C, а ввечері термометр уже показував -3°C, тобто різниця склала цілих 18 градусів.