我似乎无法在运行名为factorial()的函数时不出现错误。
首先如果我有inbuf = atoi(factorial(inbuf));
,gcc会吐出来,
main.c:103: warning: passing argument 1 of ‘factorial’ makes integer from pointer without a cast
如果我把它改成
inbuf = atoi(factorial(inbuf*));
,gcc就会弹出,main.c:103: error: expected expression before ‘)’ token
相关代码:
int factorial(int n)
{
int temp;
if (n <= 1)
return 1;
else
return temp = n * factorial(n - 1);
} // end factorial
int main (int argc, char *argv[])
{
char *inbuf[MSGSIZE];
int fd[2];
# pipe() code
# fork() code
// read the number to factorialize from the pipe
read(fd[0], inbuf, MSGSIZE);
// close read
close(fd[0]);
// find factorial using input from pipe, convert to string
inbuf = atoi(factorial(inbuf*));
// send the number read from the pipe to the recursive factorial() function
write(fd[1], inbuf, MSGSIZE);
# more code
} // end main
关于解引用和语法,我遗漏了什么??
最佳答案
您需要重新排列这条线上的通话:
inbuf = atoi(factorial(inbuf*));
应该是
int answ = factorial(atoi(inbuf));
*假设所有其他代码都有效,但我认为您需要将inbuf的声明从
char *inbuf[MSGSIZE];
更改为char inbuf[MSGSIZE];