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

int main(void) {
    char str[4][50];
    double sum = 0.0;

    for (int i = 0; i < 4; i++) {
        printf("Enter floating-point string %d: ", i + 1);
        scanf("%49s", str[i]);
        sum += strtod(str[i], NULL);
    }

    printf("Total sum: %.4f\n", sum);
    return 0;
}