C : converting binary to decimal

Question

Is there any dedicated function for converting the binary values to decimal values. such as (1111 to 15 ) , ( 0011 to 3 ) .

Thanks in Advance

Answer 1

Parse it with strtol, then convert to a string with one of the printf functions. E.g.

char binary[] = "111";
long l = strtol(binary, 0, 2);
char *s = malloc(sizeof binary);
sprintf(s, "%ld\n", l);

This allocates more space than needed.