两个scanf函数，但其​​中一个读取不同的值

Question

I'm struggling in letting the program read the variable total that was previously input after asking for the input for the variable month. The total is always 28257 and I don't know why.

I found out using " %c" on line 11 works, but I would like to know why "%s" doesn't.

    #include <stdio.h>  
    int main(void) { 

    int total; 
    char month;
    float sales;

    printf ("Enter total amount collected (-1 to quit): ");
    scanf("%d", &total);
    printf("Enter name of month: ");
    scanf("%s", &month);
    printf("total collections : $ %d\n", total);
    sales = (total/1.09);
    printf("sales : $ %.2f\n", sales);
    printf("county sales tax: $ %.2f\n", sales * 0.05);
    printf("state tax: $ %.2f\n", sales*0.04);
    printf("total sales tax collected: $ %.2f\n", sales *0.05 + sales *0.04);
    return 0;   }

Answer 1

you declared month as character, so you should use %c for input. %s is used for input character array. and before scanf("%c", &month); , also use getchar(); .

• getchar();
• scanf("%c", &month);