如何用C语言编写一个程序？？？

#include"stdio.h"
#include"string.h"
#include<iostream.h>
typedef struct
{
char name[32];
char tel[16];
} contact;

contact list[100];

int main()
{

char name[32];
strcpy(list[0].name,"keefo");
strcpy(list[0].tel,"1234567");
strcpy(list[1].name,"keefo1");
strcpy(list[1].tel,"12345671");
strcpy(list[2].name,"keefo2");
strcpy(list[2].tel,"12345672");
strcpy(list[3].name,"keefo3");
strcpy(list[3].tel,"12345673");

while(cin>>name)
{
if(strcmp("exit",name)==0)
return 0;
for(int i=0;i<4;i++)
{
if(strcmp(list[i].name,name)==0)
{
cout<<list[i].tel<<endl;
break;
}
}
}
return 0;
}

#include"stdio.h"
#include