vscode不能命中断点如何解决

//test.cpp

#include <stdio.h>

int g_var = 0;

void print_line(char *str)

{

    if (str != NULL)

        printf("%s\r\n", str);

    else

        printf("null string\r\n");

}

int main (int argc, char **argv)

{

    int l_var = 1;

    print_line("hello world!");

    printf("g_var = %d, l_var = %d.\r\n", g_var, l_var);

    return 0;

}

{

        "version": "0.2.0",

        "configurations": [

            {

                "name": "(gdb) Launch",

                "type": "cppdbg",

                "request": "launch",

                "program": "${workspaceRoot}/test.exe",

                "args": [],

                "stopAtEntry": false,

                "cwd": "${workspaceRoot}",

                "environment": [],

                "externalConsole": true,

                "MIMode": "gdb",

                "miDebuggerPath": "C:\\MinGW\\bin\\gdb.exe",

                "setupCommands": [

                    {

                        "description": "Enable pretty-printing for gdb",

                        "text": "-enable-pretty-printing",

                        "ignoreFailures": true

                    }

                ]

            }

        ]

    }

{

    // See https://go.microsoft.com/fwlink/?LinkId=733558

    // for the documentation about the tasks.json format

    "version": "2.0.0",

    "tasks": [

        {

            "taskName": "test",

            "type": "shell",

            "command": "g++",

            "args": ["-g", "${file}", "-o", "${workspaceRoot}/test.exe"]

        }

    ]

}