Linux命令（十四）gdb调试

1. gdb调试

fun.c

#include <stdio.h>     
#include "head.h"      


int sum(int a, int b)  
{ 
    printf("welcome call %s, %d + %d = %d
",__FUNCTION__, a, b, a + b);
    return a + b;      
}
 
int mul(int a, int b)
{
    printf("welcome call %s, %d * %d = %d
", __FUNCTION__, a, b, a * b);
    return a * b;
}

head.h

#include <stdio.h>     
                       
int sum(int a, int b); 

int mul(int a, int b);

main.c

#include <stdio.h>     
#include <string.h>    
#include <stdlib.h>    
#include "head.h"

typedef struct MyfunInfo 
{ 
    int fun_type;           // 函数类型
    int a;                  // 函数的第一个参数     
    int b;                  // 第二个参数           
    char funname[10];       // 函数名称
}MyfunInfo;

int main(int argc, char *argv[])
{
    int a = 2;
    int i = 0;
    int a1 = 10, b1 = 5;    
    MyfunInfo funinfo[2];   
    char *Msg = "I will die !";
    //Msg[0] = '1';
    if (argc == 3)
    {
        a1 = atoi(argv[1]);     
        b1 = atoi(argv[2]);     
        funinfo[0].a = a1;      
        funinfo[0].b = b1;      
        funinfo[1].a = a1;      
        funinfo[1].b = b1;      
    }

    for (int i = 0; i < 2; i++)
    {
        printf("i===%d, LINE=%d
", i, __LINE__);
        if (i == 0)
        {
            funinfo[i].fun_type = 1;
            printf("begin call sum
");
            strcpy(funinfo[i].funname, "sum");
            sum(funinfo[i].a, funinfo[i].b);
        }
        if (i == 1)
        {
            funinfo[i].fun_type = 2;   //call mul
            printf("begin call mul
");
            strcpy(funinfo[i].funname, "mul");
            mul(funinfo[i].a, funinfo[i].b);
        }
    }

    printf("say bye
");

    return 0;
}