如何将shell输出实现为C语言的输入？

Question

For example, Guess I have a compiled c program, named as 'binaryOutput'. And in Unix environment, [root@blablabla ~ ] ./binaryOutput print out some result like this [0] [1] [0] [1] [1]

I want to using these result as the input of another c file.

In C lanugage, I can run the file.

system("./binaryOutput") ;

After the code, I want to add the numbers as an array's input. How can I do it?

Answer 1

popen example. You can get the output of the command.

#include <stdio.h>

int main(void)
{
  FILE *fp=NULL;
  char line[1024];
  if ( (fp=popen("ls", "r"))==NULL )
  {
    return -1;
  }
  while( fgets(line, 1023, fp)!=NULL )
  {
    printf("read from popen:%s", line);
  }
  pclose(fp);
  return 0;
}