#include<stdio.h>
int main()
{int a[5][5];int n = 1;for(int i = 0;i < 5;i ++){for(int j = 0;j < 5;j ++){a[i][j] = n;n += 2;}}for(int i = 0;i < 5;i ++){for(int j = 0;j <= i;j ++)printf("%-5d",a[i][j]);printf("\n");}return 0;
}

运行截图：

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