if条件和for循环语句、while、do..while、switch语法
??int score = 60;switch(score){ case 40: NSLog(@"不及格"); break; case 60: NSLog(@"及格"); break; case 90: NSLog(@"优秀"); break; default: NSLog(@"无分数"); break;}?
?
?int score = 60;switch(score){ case 40: NSLog(@"不及格"); break; case 60: NSLog(@"及格"); break; case 90: NSLog(@"优秀"); break; default: NSLog(@"无分数"); break;}?
int score = 60;switch(score){ case 40: NSLog(@"不及格"); break; case 60: NSLog(@"及格"); break; case 90: NSLog(@"优秀"); break; default: NSLog(@"无分数"); break;}
