gcc -g -o activity activity.c

gdb activity

run -b bval value

watch total

continue

#include

#include

#include

int main(int argc, char **argv) {

extern char *optarg;

extern int optind;

int c, err = 0;

int rflag=0, bflag=0;

char *bval = "default_bval", *value;

int bval_int, value_int, total;

static char usage[] = "usage: %s [-r] -b bval value ";

while ((c = getopt(argc, argv, "rb:")) != -1) {

switch (c) {

case 'r':

rflag = 1;

break;

case 'b':

bflag = 1;

bval = optarg;

break;

case '?':

err = 1;

break;

}

}

if (bflag == 0) { /* -b was mandatory */

fprintf(stderr, "%s: missing -b option ", argv[0]);

fprintf(stderr, usage, argv[0]);

exit(1);

} else if ((optind+1) > argc) {

/* need at least one value */

fprintf(stderr, "%s: missing value ", argv[0]);

fprintf(stderr, usage, argv[0]);

exit(1);

} else if (err) {

fprintf(stderr, usage, argv[0]);

exit(1);

}

/* convert bval and value to integers */

bval_int = atoi(bval);

value = argv[optind];

value_int = atoi(value);

/* calculate the total */

total = bval_int + value_int;

/* print the result */

printf("Total = %d ", total);

exit(0);

}

can someone show me the output