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我有一個C程序,我想讓指針做計算而不是下標。下面的代碼:用指針替換下標C
/* rain */
#define TWLV 12
#define YRS 5
main()
{
static float rain [YRS][TWLV] = {
{10.2, 8.1, 6.8, 4.2, 2.1, 1.8, 0.2, 0.3, 1.1, 2.3, 6.1, 7.4},
{9.2, 9.8, 4.4, 3.3, 2.2, 0.8, 0.4, 0.0, 0.6, 1.7, 4.3, 5.2},
{6.6, 5.5, 3.8, 2.8, 1.6, 0.2, 0.0, 0.0, 0.0, 1.3, 2.6, 4.2},
{4.3, 4.3, 4.3, 3.0, 2.0, 1.0, 0.2, 0.2, 0.4, 2.4, 3.5, 6.6},
{8.5, 8.2, 1.2, 1.6, 2.4, 0.0, 5.2, 0.9, 0.3, 0.9, 1.4, 7.2}
};
/* initialize rainfall data for 1970-74 */
int year, month;
float subtot, total;
printf(" YEAR RAINFALL (inches)\n");
for (year = 0, total = 0; year < YRS; year++)
{ /* for each year, sum rainfall for each month */
for (month = 0, subtot = 0; month < TWLV; month++)
subtot += rain[year][month];
printf("%5d, %15.1f\n", 1970 + year, subtot);
total += subtot; /*total for all years */
}
printf("\nThe yearly average is %.1f inches. \n\n", total/YRS);
printf("MONTHLY AVERAGES:\n\n");
printf("Jan Feb Mar Apr May Jun Jul Aug Sep Oct");
printf("Nov Dec\n ");
for (month = 0; month < TWLV; month++)
{ /* for each month, sum rainfall over years */
for (year = 0, subtot =0; year < YRS; year++)
subtot += rain[year][month];
printf("%4.1f ", subtot/YRS);
}
printf("\n");
}
我與陣列掙扎/被互換使用指針,所以如果有人能夠提供這將是巨大的解釋。
謝謝!
請正確縮進您的代碼。 –
使用下標有什麼問題? –
你的main()的定義是錯誤的,你使用的是一本很老的書嗎? –