// #include #include int main () { int checksum, integer_value, sum = 0; char value[1000]; printf("Enter an abitrarily long string, ending with carriage return > "); scanf("%s", value); int i; int stringlength = strlen(value); for (i = 0; i < stringlength; i++) { integer_value = value[i]; sum = sum + integer_value; } checksum = (sum%64) + ' '; printf("Check sum is %c\n", checksum); return(0); }