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| #include <iostream> #include <math.h>
void func1(double stu[10][6]) { for (int i = 0; i < 10; ++i) { if (!i) { printf("编号\ts1\t\ts2\t\ts3\t\ts4\t\ts5\t\t平均成绩\n"); } printf("%d\t", i + 1); for (int j = 0; j < 6; ++j) { printf("%.2lf\t", stu[i][j]); } printf("\n"); } }
void func2(double stu[10][6]) { double class_sum[5] = {0}; for (int i = 0; i < 10; ++i) { for (int j = 0; j < 5; ++j) { class_sum[j] += stu[i][j]; } } for (int i = 0; i < 5; ++i) { class_sum[i] /= 10; } printf("平均\t"); for (int i = 0; i < 5; ++i) { printf("%.2lf\t", class_sum[i]); } printf("\n"); }
void func3(double stu[10][6]) { double max_num = -1; int max_row, max_col; for (int i = 0; i < 10; ++i) { for (int j = 0; j < 5; ++j) { if (stu[i][j] > max_num) { max_num = stu[i][j]; max_row = i; max_col = j; } } } printf("最高分数为:%.2lf,科目为:s%d,学生编号为:%d\n", max_num, max_col + 1, max_row + 1); }
void func4(double stu[10][6]) { double Dx, Sigma1 = 0, Sigma2 = 0; for (int i = 0; i < 10; ++i) { Sigma1 += stu[i][5]; Sigma2 += pow(stu[i][5], 2); } Dx = (Sigma2 / 10) - (pow(Sigma1 / 10, 2)); printf("平均分方差为:%.2lf\n", Dx); }
int main() { double stu[10][6] = {0}; for (int i = 0; i < 10; ++i) { for (int j = 0; j < 5; ++j) { stu[i][j] = (random() % 40) + 50;
stu[i][5] += stu[i][j]; } stu[i][5] = stu[i][5] / 5; }
func1(stu); func2(stu); func3(stu); func4(stu); }
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