参照书中关于布尔类型实例，敲出下面代码
#import
//比较两个整数是否相等
BOOL areIntsDifferent(int num1,int num2){
if (num1==num2) {
return (NO);
}else {
return (YES);
}
//将BOOL值转为相应的NSString类型
NSString *boolString(BOOL noYes){
if (noYes==NO) {
return (@"NO");
}else {
return (@"YES");
}
}
//在main函数中调用上面方法
int main (int argc,constchar * argv[]) {
BOOL areTheyDifferenr;
areTheyDifferenr=areIntsDifferent(5,5);
NSLog(@"are %d and %d different %@",5,5,boolString(areTheyDifferenr));
areTheyDifferenr=areIntsDifferent(23,42);
NSLog(@"are %d and %d different %@",23,42,boolString(areTheyDifferenr));
return0;
}
运行结果：
总结：Objective-C中的BOOL类型与C和JAVA很像，用法也比较简单，需要注意的是Objective-C的BOOL类型是YES值和NO值，而不是true和false。