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can any one tell me about What's the different color in single auhtor page mean ?

can any one tell me about What's the different color in single auhtor page mean ?

#include "iostream.h"
#include "string.h"
#include "stdio.h"
#include "fstream.h"

void noblank(char str[])
{
long l=strlen(str);
long i,j;
for(i=0;i<l;i++)
{
if(!(str >='0'&&str <='9'))
{
for(j=i;j<l-1;j++)
{
str[j]=str[j+1];
}
l--;
str[l]='\0';
i=-1;
}
}
}

void main()
{
bool ac,wa ...

#include "iostream.h"
#include "stdlib.h"
#include "string.h"
#include "stdio.h"

struct str
{
char base[100000];
int len;
};

bool mod3(str year)
{
long sum;
div_t t;
sum=0;
int i;
for(i=0;i<year.len;i++)
sum+=(year.base -'0');
t=div(sum,3);
if(t.rem==0)
return true;
return false ...

you should use string to read the year

[cpp]
#include "iostream.h"
#include "stdio.h"
#include "string.h"

char str[800];
int list[26];

void init()
{
int i;
for(i=0;i<26;i++)
list =0;
}

void input()
{
int i,l,n,j;
cin>>n;
for(j=0;j<n;j++)
{
gets(str);
l=strlen(str);
for(i=0;i<l;i++)
{
if((str >='A')&&(str <='Z'))
list[str ...