scanf()在输入int型变量后无法正确读入char型变量的解决方案

àì夳堔傛蜴生んèń 2022-10-22 14:54 150阅读 0赞

//问题程序
    //无法正确读入char型变量b的值
    //b变量存储的是输入变量a的值结束后按下的回车符
    #include<stdio.h>
    int main()
    {
        int a;
        char b;
        float c;
        printf("Please input an integer:");
        scanf("%d", &a);
        printf("integer: %d\n", a);
        printf("Please input a character:");
        scanf("%c", &b);
        printf("character: %c\n", b);
        printf("Please input a float number:");
        scanf("%f", &c);
        printf("float: %f\n", c);
        return 0;
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjA0ODQ2Mw_size_16_color_FFFFFF_t_70][]

//修改方案1
    #include<stdio.h>
    int main()
    {
        int a;
        char b;
        float c;
        printf("Please input an integer:");
        scanf("%d", &a);
        getchar();//接收按下的回车符
        printf("integer: %d\n", a);
        printf("Please input a character:");
        scanf("%c", &b);
        printf("character: %c\n", b);
        printf("Please input a float number:");
        scanf("%f", &c);
        printf("float: %f\n", c);
        return 0;
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjA0ODQ2Mw_size_16_color_FFFFFF_t_70 1][]

//修改方案2
    #include<stdio.h>
    int main()
    {
        int a;
        char b;
        float c;
        printf("Please input an integer:");
        scanf("%d", &a);
        printf("integer: %d\n", a);
        printf("Please input a character:");
        scanf(" %c", &b);//在"%c"前加一个空格
        printf("character: %c\n", b);
        printf("Please input a float number:");
        scanf("%f", &c);
        printf("float: %f\n", c);
        return 0;
    }

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjA0ODQ2Mw_size_16_color_FFFFFF_t_70 2][]

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjA0ODQ2Mw_size_16_color_FFFFFF_t_70 1]: /images/20221022/613098e7b9114d5baec1a462b2d23dcb.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjA0ODQ2Mw_size_16_color_FFFFFF_t_70 2]: /images/20221022/0ec235fa879b4e118e2d953d9cad6d87.png