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dia chi email ptit 1.cpp
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dia chi email ptit 1.cpp
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#include<stdio.h>
#include<string.h>
int main() {
char s[51],a[51];
gets(s);
for (int i=0;i<strlen(s);i++)
{
if (s[i]>=65 && s[i]<=90) s[i]=s[i]+32;
}
strcpy(a,s);
int dem=0;
char *token=strtok(s," ");
while(token!=NULL)
{
dem++;
token=strtok(NULL," ");
}
int b=strlen(a),dem1=0;
if (a[0]!=' ') // Truong hop neu khong co dau cach dau dong
{
printf("%c",a[0]);
for (int i=0;i<b;i++)
{
if (a[i]==' ' && a[i+1]!=' ')
{
dem1++;
if (dem1==dem-1)
{
for (int j=i+1;j<b;j++)
{
if(a[j]>='a' && a[j]<='z') printf("%c",a[j]);
}
}
else
{
if (a[i+1]>='a' && a[i+1]<='z') printf("%c",a[i+1]);
}
}
}
printf("@ptit.edu.vn");
}
else // Truong hop neu co dau cach dau dong
{
for (int i=0;i<b;i++)
{
if (a[i]==' ' && a[i+1]!=' ')
{
dem1++;
if (dem1==dem)
{
for (int j=i+1;j<b;j++)
{
if(a[j]>='a' && a[j]<='z') printf("%c",a[j]);
}
}
else
{
if (a[i+1]>='a' && a[i+1]<='z') printf("%c",a[i+1]);
}
}
}
printf("@ptit.edu.vn");
}
}