C语言
题解 | #高精度整数加法#

include <stdio.h>

int main()
{
char buf1[10001] = { 0 };
char buf2[10001] = { 0 };
while (scanf("%s", buf1) != EOF) {
scanf("%s", buf2);

    char array[10002] = { 0 };
    int i, j;
    for (i = strlen(buf1) - 1, j = 0; i >= 0, j < strlen(buf1); i--, j++) {
        array[j] = buf1[i] - 0x30;
    }

    for (i = strlen(buf2) - 1, j = 0; i >= 0, j < strlen(buf2); i--, j++) {
        array[j] += buf2[i] - 0x30;
        if (array[j] > 9) {
            array[j] %= 10;
            array[j + 1]++;
        }
    }

    if (strlen(buf1) > strlen(buf2)) {
        i = strlen(buf1);
    } else {
        i = strlen(buf2);
    }

    if (array[i] == 0) {
        i--;
    }

    for (i; i >= 0; i--) {
        printf("%c", array[i] + 0x30);
    }
    printf("\n");
}

return 0;

}