如何修复函数中的条件？

Question

When I run my code, the output only prints the else statement. How can I fix that?

#include <stdio.h>

void printIt();
int num;

int main(){
    int num;
    printf("What is your annual income? ", &num);
    scanf("%d", &num);
    printIt();
}

void printIt() {                                      // If user makes over 90,000, machine will print congratulations.
                                                       // If user makes less than 90,000 machine will print keep going.
    if(num > 90000){
        printf("Congratulations, you are doing great!");
        return;
    }
    else{
        printf(" You will make $90,000, if you keep going.");
        return;
    }
}

Answer 1

You have two variables both called num . One is created in main and is local to main . The other is global. Look for int num; in your code and you'll see that there are two of them.

I would suggest you get rid of the global num and instead pass num to printIt . The easier (but worse) solution is to get rid of the local num in main .