28 lines
444 B
C
28 lines
444 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <math.h>
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#include <stdbool.h>
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// !函数原型声明
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int num_sum(int begin, int end);
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int main()
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{
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printf("%d\n", num_sum(1, 10));
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printf("%d\n", num_sum(20, 30));
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printf("%d\n", num_sum(35, 45));
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return 0;
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}
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// !函数定义
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int num_sum(int begin, int end)
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{
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int sum = 0;
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for (int i = begin; i <= end; i++)
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{
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sum += i;
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}
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return sum;
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} |