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converting types

Oliver Swid

hi Forum,

how can i convert items in a Array from typ Char[] in an Integer-Type?

example:
char data[] = "110111";
int sum = 0;

sum = (int)data;

or should i sum the all items in the array bitwise?

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  • 0

    I'm assuming you are converting a binary number stored as a string into int. This should do the job:

    char data[] = "110111";
int sum = 0;

int i;
for (i=0; data[i] != '\0'; i++) {
    sum <<= 1;
    if ( data[i] == '1' )
        sum |= 1;
}
/* it's done */
    Or, if you wanted to count the number of ones in the string:
    char data[] = "110111";
int sum = 0;

int i;
for (i=0; data[i] != '\0'; i++) {
    sum += data - '0';
}
/* it's done */
    No offense, but with questions like these how do you expect to write any program in C? There are lots of good books on C, say K&R.

    - mike

Reply
  • 0

    I'm assuming you are converting a binary number stored as a string into int. This should do the job:

    char data[] = "110111";
int sum = 0;

int i;
for (i=0; data[i] != '\0'; i++) {
    sum <<= 1;
    if ( data[i] == '1' )
        sum |= 1;
}
/* it's done */
    Or, if you wanted to count the number of ones in the string:
    char data[] = "110111";
int sum = 0;

int i;
for (i=0; data[i] != '\0'; i++) {
    sum += data - '0';
}
/* it's done */
    No offense, but with questions like these how do you expect to write any program in C? There are lots of good books on C, say K&R.

    - mike

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