UVa 424 Integer Inquiry

UVa 424 Integer Inquiry

#include<cstdio>
#include<cstring>
char str1[150];
char str2[150];
char temp1[150];
char temp2[150];
char ans[150];
int main() {
scanf("%s", str2);
while (scanf("%s", str1))
{
memset(ans, 0, sizeof(ans));
if (str1[0] == '0')
break;
int j = 0;
for (int i = strlen(str1) - 1; i >= 0; i--)
{
temp1[j++] = str1[i];
}
//  puts(temp1);
j = 0;
for (int i = strlen(str2) - 1; i >= 0; i--)
{
temp2[j++] = str2[i];
}
//  puts(temp2);
int max = strlen(str1) > strlen(str2) ? strlen(str1) : strlen(str2);
for (int i = 0; i < max; i++)
ans[i] = (temp1[i] & 0xf) + (temp2[i] & 0xf);
for (int i = 0; i < max; i++)
if (ans[i] >= 10)
{
ans[i + 1]++;
ans[i] %= 10;

}

j = 0;
bool flag = true;
for (int i = max - 1; i >= 0; i--)
{
if (ans[max] == 1 && flag) {
str2[j++] = '1';
flag = false;
}
str2[j++] = ans[i] + '0';
}
}

puts(str2);
return 0;

}