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Objective-C 程序设计（第六版）第二章习题答案
1.略
2.
#import <Foundation/Foundation.h>int main(int argc, const char * argv[]){ @autoreleasepool { // insert code here... NSLog(@"In Obiective-c, lowercase letters are significance .\n main is where program execution begins.\n Open and closed brace enclose program stateme nts in a routine .\n All program statements must be terminated by a semicolon .");
}
return 0;
}
3.
testing...
.... 1
... 2
.. 3
4.
int value1, value2, sum;
value1 = 87; value2 = 15; sum = value1 - value2; NSLog(@"sum is %i", sum);
5.改正后的程序
int sum; <---原文INT改为int.
/* COMPUTE RESULT*/ <---原文右注释号//改为*/. sum = 25+37-19; <---原文后加分号结束. /* DISPLAY RESULTS*/ <---原文注释号改为/*..*/或//. NSLog(@"The answer is %i",sum); <---原文改为双引号，加上sum前的逗号.
6.
The result is 95.
END
Objective-C 程序设计（第六版）第二章习题答案
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