大数乘法

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

#define MaxSize 1000

char *TwoBigNumMult(char *InputMultiplier_1,char *InputMultiplier_2)
{
    int *TempResult = malloc(MaxSize*sizeof(int));
    int TempResultEnd = 0;
    memset(TempResult,0,MaxSize*sizeof(int));
    
    
    int MultiplierLen_1 = strlen(InputMultiplier_1);
    int MultiplierLen_2 = strlen(InputMultiplier_2);
    char *Result = malloc((MultiplierLen_1+MultiplierLen_2+2)*sizeof(char));
    memset(Result,0,sizeof(Result));
    int ResultEnd = 0;
    
    //Plus && Carry
    int MultiplierEnd_1,MultiplierEnd_2;
    for(MultiplierEnd_1 = 0;MultiplierEnd_1 < MultiplierLen_1;MultiplierEnd_1 ++)
    {
        for(MultiplierEnd_2 = 0;MultiplierEnd_2 < MultiplierLen_2;MultiplierEnd_2 ++)
        {
            TempResult[MultiplierEnd_1 + MultiplierEnd_2 + 1] 
            +=  (InputMultiplier_1[MultiplierEnd_1]-'0') * (InputMultiplier_2[MultiplierEnd_2]-'0');
        }
    }
    
    int CarryEnd;
    for(CarryEnd = MultiplierLen_1+MultiplierLen_2 - 1;CarryEnd > 0;CarryEnd --)
    {
        if(TempResult[CarryEnd] >= 10)
        {
            TempResult[CarryEnd-1] += TempResult[CarryEnd] / 10;
            TempResult[CarryEnd] %= 10;
        }
    }
    
    //store to return
    //0 screening
    int OutputFlag = 0;
    for(;TempResult[TempResultEnd]==0 && TempResultEnd < MultiplierLen_1+MultiplierLen_2;TempResultEnd ++)
        ;
    for(ResultEnd = 0;TempResultEnd < MultiplierLen_1+MultiplierLen_2;ResultEnd ++,TempResultEnd ++)
    {
        Result[ResultEnd] = TempResult[TempResultEnd] + '0';
        OutputFlag = 1;
    }
    if(!OutputFlag)
    {
        Result[ResultEnd++] = '0';
    }
    Result[ResultEnd] = '\0';
    return Result;
}

int main()
{
    char InputMultiplier_1[MaxSize] = "10";
    char InputMultiplier_2[MaxSize] = "0";
    
    char *Result = TwoBigNumMult(InputMultiplier_1,InputMultiplier_2);
    puts(Result);
    return 0;
}