以下是一個用C語言輸出菱形圖案的示例代碼：
#include <stdio.h>
int main() {
int n, c, k, space = 1;
printf("Enter number of rows: ");
scanf("%d", &n);
space = n - 1;
for (k = 1; k <= n; k++) {
for (c = 1; c <= space; c++)
printf(" ");
space--;
for (c = 1; c <= 2*k-1; c++)
printf("*");
printf("\n");
}
space = 1;
for (k = 1; k <= n - 1; k++) {
for (c = 1; c <= space; c++)
printf(" ");
space++;
for (c = 1 ; c <= 2*(n-k)-1; c++)
printf("*");
printf("\n");
}
return 0;
}
使用以上代碼，用戶輸入行數后，程序會輸出一個由星號組成的菱形圖案。
