求1-10阶乘的和
            时间:2021-03-24 20:26:16  
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        #include <stdio.h>
int main() {
    int i = 0;
    int sum = 1;
    int a = 0;
    for (i = 1; i <= 10; i++) {
        sum *= i;
        a += sum;   
    }
    printf("%d ", a);
    return 0;
}

原文:https://blog.51cto.com/15100290/2670943
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