c - C 函数不工作

Question

我正在编写一个函数Calculate_age_when_Trump_elected(int year_born)来返回结果并为age_when_Trump_elected.

结果应该是YEAR_TRUMP_ELECTED减去特朗普出生的年份，但目前它只显示用户输入的输入。

“terminal_user_input.c”只是一个函数文件 read_string和read_integer.

#include <stdio.h>
#include <ctype.h>
#include <stdbool.h>
#include "terminal_user_input.c"

#define YEAR_TRUMP_ELECTED 2016


// A very basic  read boolean function

bool read_boolean(const char* prompt)
{
    my_string answer;
    bool result;

    answer = read_string(prompt);
    answer.str[0] = (char) tolower(answer.str[0]);

    switch (answer.str[0]) {
        case 'n':
            result = false;
            break;
        case 'x':
            result = false;
            break;
        default:
            result = true;
    }

    return result;
}

int Calculate_age_when_Trump_elected(int year_born)
{
    int result;
    result = YEAR_TRUMP_ELECTED - year_born;

    return 0;
}

int main()
{
    my_string name;
    int age_when_Trump_elected;
    int year_born;
    bool brexiter;

    name = read_string("What is your name? ");

    year_born = read_integer("When you were born? ");
    age_when_Trump_elected = Calculate_age_when_Trump_elected(year_born);
    printf("You were %d years old when Trump was elected\n",year_born);

    brexiter = read_boolean("Are u a Brexit support? ");

    if (brexiter == true)
    {
       printf("%s is a Brexit supporter\n",name.str);
    }
    else
    {
       printf("%s isn't a Brexit supporter\n",name.str);
    }

    read_string("Type 'exit' to continue ");

    return 0;
}

标签： c

Answer 1

看Calculate_age_when_Trump_elected。它总会回来0的。您应该改为返回该result变量。