C语言进阶课程学习记录-数组指针和指针数组分析

C语言进阶课程学习记录-数组指针和指针数组分析

• • 实验-数组指针的大小
  • 实验-指针数组
  • 小结

    本文学习自狄泰软件学院 唐佐林老师的 C语言进阶课程，图片全部来源于课程PPT，仅用于个人学习记录

    

    

    

    

    实验-数组指针的大小

    #include 
    typedef int(AINT5)[5];
    typedef float(AFLOAT10)[10];
    typedef char(ACHAR9)[9];
    int main()
    {
        AINT5 a1;
        float fArray[10];
        AFLOAT10* pf = &fArray;
        ACHAR9 cArray;
        char(*pc)[9] = &cArray;
        char(*pcw)[4] = cArray;
        int i = 0;
        printf("%d, %d\n", sizeof(AINT5), sizeof(a1));//20 20
        for(i=0; i
            (*pf)[i] = i;
        }
        for(i=0; i
            printf("%f\n", fArray[i]);
        }
        //0~9
        printf("%p, %p, %p\n", &cArray, pc+1, pcw+1);// pc+9 pcw+4
        return 0;
    }
        /*
        output:
    20, 20
    0.000000
    1.000000
    2.000000
    3.000000
    4.000000
    5.000000
    6.000000
    7.000000
    8.000000
    9.000000
    0060FEAB, 0060FEB4, 0060FEAF
        */
    
        int ret = -1;
        int i = 0;
        for(i=0; i
            if( strcmp(key, table[i]) == 0 )
            {
                ret = i;
                break;
            }
        }
        return ret;
    }
    int main()
    {
        const char* keyword[] = {
                "do",
                "for",
                "if",
                "register",
                "return",
                "switch",
                "while",
                "case",
                "static"
        };
        printf("%d\n", lookup_keyword("return", keyword, DIM(keyword)));
        printf("%d\n", lookup_keyword("main", keyword, DIM(keyword)));
        return 0;
    }
        /*
        output:
    4
    -1
        */