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#include <stdio.h>
#include <stdbool.h>
int main(voID){
long num;
long sum = 0L;
bool input_is_good;
printf("Please enter an integer to be summed ");
printf("(q to quit): ");
input_is_good = (scanf("%ld", &num) == 1);
while (input_is_good){
sum = sum + num;
printf("Please enter next integer (q to quit): ");
input_is_good = (scanf("%ld", &num) == 1);
}
printf("sum: %ld.\n", sum);
return 0;
}
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