theboy的起居注

#import <Foundation/Foundation.h>
 
int main (int argc, const char * argv[]) {
    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
 
    NSString *homeword=@"I love duoduoluo";//字符串
	NSRange range=NSMakeRange(3, 8);//范围从3开始选取8个字符
	NSRange range2=[homeword rangeOfString:@"duoduo"];//判断是否存在此字符串
	if(range2.length>0){
 
		NSLog(@"%@",NSStringFromRange(range2));//输出行列
	}
	NSLog(@"%@",[homeword substringWithRange:range]);//输出截取的字符串
    [pool drain];
    return 0;
}