Question

Please tell me what I am doing wrong

//I'm trying to get the number of the month by sending its name.
#include <stdio.h>

My function

int monthstr2num (char month[]){                                                


if (month == "September")
    return 8;


}

int main (){
char month []={"September"};
int num;

num = monthstr2num (month);//func call

displays a wrong output like 37814040

printf ("%d", num);

return 0;
}

Answer 1

Your problem lies in two places.

First is where you are using == to compare a string, that isn’t possible in C (It’s undefined behavior, it compiles but won’t do what you want). You must use a function in the C library called strcmp. It’s located in string.h and can be used like so:

if(strcmp(month,"September")==0)
    return 8;

Also, when that if statement returns false, you must have another return outside the if statement, such as return 0;