Created
June 9, 2015 17:53
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#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
void reverse(char str[]); | |
void add(char num1[], char num2[], char sum[]); | |
int main(int argc, char** argv) | |
{ | |
int n, i; | |
char num1[200], num2[200], sum[210]; | |
scanf("%d", &n); | |
for(i = 0; i < n; i++) | |
{ | |
scanf("%s %s", num1, num2); | |
reverse(num1); | |
reverse(num2); | |
add(num1, num2, sum); | |
reverse(sum); | |
printf("%s\n", sum); | |
} | |
return 0; | |
} | |
void add(char num1[], char num2[], char sum[]) | |
{ | |
int len1 = strlen(num1); | |
int len2 = strlen(num2); | |
int len = len1 > len2 ? len1 : len2; | |
int i; | |
char d1, d2, d3; | |
int carry = 0; | |
reverse(num1); | |
reverse(num2); | |
for(i = 0; i < len; i++) | |
{ | |
if(i < len1) | |
{ | |
d1 = num1[i] - '0'; | |
} | |
if(i < len2) | |
{ | |
d2 = num2[i] - '0'; | |
} | |
d3 = d1 + d2 + carry; | |
d1 = 0; | |
d2 = 0; | |
if(d3 >=10) | |
{ | |
carry = 1; | |
sum[i] = (d3 - 10) + '0'; | |
} | |
else | |
{ | |
carry = 0; | |
sum[i] = d3 + '0'; | |
} | |
} | |
if(carry == 1) | |
{ | |
sum[len] = '1'; | |
sum[len+1] = '\0'; | |
} | |
else | |
{ | |
sum[len] = '\0'; | |
} | |
reverse(sum); | |
} | |
void reverse(char str[]) | |
{ | |
int i, length = strlen(str); | |
for(i = length-1; i >= 0; i--) | |
{ | |
if(str[i] == '0') | |
{ | |
str[i] = '\0'; | |
} | |
else | |
{ | |
break; | |
} | |
} | |
length = strlen(str); | |
int halflength = length / 2; | |
for(i = 0; i < halflength; i++) | |
{ | |
str[i]^=str[length-i-1]; | |
str[length-i-1]^=str[i]; | |
str[i]^=str[length-i-1]; | |
} | |
} |
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