如何使用 GCC 在 Mac 终端上调试 C 程序？

Question

I want to debug the C program on my Mac Terminal. I use "gcc -o deng.c"

PS: The path is right, but it says "No such file or directory".

I have installed Xcode and Commd line already.

#include <stdio.h>
#include <string.h>

#define maxn 1000 + 10

int a[maxn];

int main()
{
    int i, j, n, k, first=1;
    memset (a, 0, sizeof(a));
    scanf("%d%d", &n, &k);

    for(i=1; i<=k; i++)
        for (j = 1; j<=n; j++)
            if(j%i == 0)
                a[j] = !a[j];

    for(i=1; i<=n; i++)
        if(a[i])
        {
            if(first)
                first = 0;
            else
                printf(" ");
            printf("%d", i);
        }

    printf("\n");
    return 0;
}

Answer 1

You need to use lldb, the substitute of gdb on Mac,

gcc -g deng.c -o deng
lldb ./deng

Answer 2

-o specifies the output file. That's not what you want here. You probably meant to run

gcc -g deng.c

The -g tells the compiler to include debugging symbols. The binary is called a.out (and you can change the program name to deng by running gcc -g deng.c -o deng )

To actually run the program, you have to run ./a.out (or ./deng , if you ran gcc with -o deng).

To debug the program, you run gdb a.out (or gdb deng ) and then type run . For more help on gdb, read the documentation