网球中心共有100个网球场，每个单位可以来申请1到100的场地，申请的场地编号必须是连续的，如果场地已经被其他单位占用，就不能再次使用，而且单位在使用完场地后必须归还。请设计一个完整的系统。
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <string.h>
struct TennisGround {
int num;
char *agentName;
};
typedef struct TennisGround TG;
void mallocTG ( TG *total ) {
int size, start, count = 0;
TG *check = NULL;
char *agentName = ( char * ) malloc ( sizeof ( char ) * 10 );
printf ( "Please input your agentName:" );
scanf ( "%s", agentName );
printf ( "Please input the size of the TennisGround:" );
scanf ( "%d", &size );
printf ( "Please input the TennisGround number you want to start:" );
scanf ( "%d", &start );
for ( check = total + start; check <= total + start + size; check++ ) {
if ( check->agentName != " " ) {
printf ( "malloc failed!\n" );
exit ( -1 );
}
}
while ( count < size ) {
( total + start + count )->agentName = agentName;
count++;
}
free ( agentName );
}
void freeTG ( TG *total ) {
char *an = ( char * ) malloc ( sizeof ( char ) * 10 );
printf ( "please input agentName you want to free:" );
scanf ( "%s", an );
int count = 0;
while ( count < 100 ) {
if ( strcmp ( ( total + count )->agentName, an ) == 0 ) {
( total + count )->agentName = " ";
}
count++;
}
}
int main() {
int i;
int sw;
TG *total = ( TG * ) malloc ( sizeof ( TG ) * 100 );
for ( i = 0; i < 100; i++ ) {
( total + i )->num = i;
( total + i )->agentName = " ";
}
while ( 1 ) {
printf ( "*******Tennis Ground Mallocation******************\n" );
for ( i = 0; i < 100; i++ ) {
printf ( "%d(%s) ", ( total + i )->num, ( total + i )->agentName );
if ( i % 5 == 0 ) {
printf ( "\n" );
}
}
printf ( "\n" );
printf ( "**************************************************\n" );
printf ( "Please input your choosen:(1-malloc,2-free):" );
scanf ( "%d", &sw );
if ( sw == 1 ) {
mallocTG ( total );
} else {
freeTG ( total );
}
}
return 0;
}