int calculate(long long bottom,long long top) {
long long sum = 0;
if (top > bottom) {
for (long long num = bottom; num <= top; num++) {
sum += num;
};
return sum;
}
else {
return 0;
}
}
int main(){
int x = calculate(1,4);
printf("calculate(1,4) = %d\n", x
);
}
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