#include <stdio.h> #include <string.h> int main() { char str1[101], str2[101], result[102] = {0}; int carry = 0, i, j, k, len1, len2, sum; scanf("%s %s", str1, str2); len1 = strlen(str1); len2 = strlen(str2); i = len1 - 1; j = len2 - 1; k = 0; while...