C如何读取逗号分隔的输入

Question

I want to read the following input into scanf:

10 0 y
2
2, 80, 40, 0

This should be ready by scanf from a separate file.

I can get the first two lines without the commas by just doing the following:

scanf("%d %d %c %d", a1, a2, a3, c1, a4);

How would I be able to read the third line that is separated by commas and store those in my variables?

Answer 1

You can just include the commas in a scanf format string:

int blinky, pinky, inky, clyde;
scanf("%d, %d, %d, %d", &blinky, &pinky, &inky, &clyde);

Here's a complete example based on your question:

#include <stdio.h>

int main(void)
{
    int a1, a2, a4;
    int blinky, pinky, inky, clyde;
    char c3;

    scanf("%d %d %c %d %d, %d, %d, %d", &a1, &a2, &c3, &a4, &blinky, &pinky, &inky, &clyde);
    printf("%d %d %c\n%d\n%d, %d, %d, %d\n", a1, a2, c3, a4, blinky, pinky, inky, clyde);

    return 0;
}

And to build and test:

$ cat input 
10 0 y
2
2, 80, 40, 0
$ make example
cc     example.c   -o example
$ ./example < input
10 0 y
2
2, 80, 40, 0