how to convert char array to integer in C?

Question

How can I convert the char array x to an integer 89 in the code below? Thank you

int main(int argc,char *argv[]){
    char y[13] = "0123456789012";
    char x[3];
    int integer_value;

    x[0] = y[8];
    x[1] = y[9];
    x[3] = '\0';

    integer_value=atoi(x);
}

Should be x[2] = '\0';, rather than x[3], but apart from that, that works. What is the question? — Daniel Fischer
– Daniel Fischer, Commented Jun 19, 2012 at 15:30
the code you wrote does exactly what you are asking... just x[2]='\0' — Felice Pollano
– Felice Pollano, Commented Jun 19, 2012 at 15:31
Also, y is one too short as there is a null character in a string literal. — hmjd
– hmjd, Commented Jun 19, 2012 at 15:32

unwind · Accepted Answer · 2012-06-19 15:50:00Z

6

You're done; atoi() is one way of doing the conversion from a string to an integer. You could also use strtol() or sscanf().

UPDATE: Assuming, of course, that you fix the termination, i.e. set x[2] = '\0'; rather than x[3].

edited Jun 19, 2012 at 15:50

answered Jun 19, 2012 at 15:32

unwind

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