高考问答嫡女锋芒之医品毒女:c语言试题 执行语句printf("2:%d,",printf("1:%d,",scanf("%d",&x)))；以后的输出结果是____。
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A) 2:1,1:1, B) 1:1,2:1, C) 2:4,1:1 D) 1:1,2:4,
请写出详细过程4，谢谢！！！
请写出详细过程4，谢谢！！！
楼上的执行顺序对的，不过不是scanf占一位，
占四位，
而是相当于把两个函数的返回值作为了变量，
scanf函数：return the number of fields successfully converted and assigned;
the return value does not include fields that were read but not assigned.
A return value of 0 indicates that no fields were assigned.
The return value is EOF for an error or if the end-of-file character or
the end-of-string character is encountered in the first attempt to read a character.
返回成功赋值的变量的个数，本题中为1，只有一个x
print函数：Each of these functions returns the number of characters printed, or a negative value if an error occurs.
返回该函数输出的字符数，本题为四个是 1:1,
所以结果是D
D
先执行printf("1:%d,",…
再执行printf("2:%d,",…
scanf占一位，所以printf("1:%d,",…输出1：1
1:%d，占四位，所以printf("2:%d,",…输出2：4
晕，你上机输入一下就知道，光执行这段语句的话啥也不出。
这样的问题也问哦
不同的输入有不同的结果