C语言用while写出1-2+3-4+5-6...+N的合 1-2+3-4+5-6+...-100用c语言的中while...
\u5173\u4e8e\u4e00\u4e2ac\u8bed\u8a00\u7684\u95ee\u9898\uff0c\u7528while\u5faa\u73af\u8ba1\u7b971-2+3-4+5-6+7-8...na\u6ca1\u6709\u5b9a\u4e49\uff0c\u5e76\u4e14\u4f60\u8ba1\u7b97\u7684\u662f1+2+3+....
\u4e0d\u9700\u8981\u7528\u5230a\uff0c\u4fee\u6539\u5982\u4e0b\uff1a
while (b < n)
{
b++;
//\u4f7f\u7528\u4e09\u5143\u8fd0\u7b97\u7b26\uff0c\u5982\u679cb\u662f\u5076\u6570\uff0c\u5219-b\uff1b\u5426\u5219+b
sum += b % 2 == 0 ? -b : b;
}
#include #include main(){ int i = 1; sum = 0; while (i <= 100) { sum += i * pow(-1, i - 1); i++; } printf("%d", sum);}
#include <stdio.h>
int main(void) /* 1-2+3-4+5-6...+N */
{
int this = 1; /* 运算起始 */
int n;
scanf("%d", &n); /* 输入N的值 */
int sum = 0;
while (this <= n) {
if (this%2 == 0) /* 是合数 */
sum -= this;
else /* 是基数 */
sum += this;
this ++; /* this递增 */
}
printf("%d
", sum);
return 0;
}
给分吧！
int func(int n) { // n 为传进来的计算上限
int plus = 1; // 标记+还是-，第一个用+， 即式子视为：+1-2+3-4+5-6...+n
int count = 1; // 从1开始循环
int sum = 0;
while(count <= n) {
if (plus == 1) {
sum += count;
} else {
sum -= count;
}
plus = plus == 1 ? 0 : 1; // 切换+-
++count;
}
return sum; // 返回结果
}
int i = 1;
int n = 20000;
int sum = 0;
int flag = 0;
while( i < n )
{
flag = !flag;
if ( flag )
sum = sum + i;
else
sum = sum - i;
i++;
}
get_sum(int N)
{
int i = 1,x=1,sum=0;
while(i <= N)
{
sum += (x?i:-i);
x = x?0:1; //每次运算，x取反，控制运算符号
i++;
}
return (sum);
}
int i = 0;
int sum = 0;
while (++i)
{
sum += (i%2==0?-1*i:i);
}
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绛旓細棣栧厛闇瑕佹妸y鍜宯鐨勫叧绯鍐欏嚭鏉 y = 1-1/3 +1/5 - ... +(-1)^(n+1) * 1/(2n-1)杩愯缁撴灉锛氶渶瑕佹敞鎰忕殑鏄紝閫氬父n鏄暣鏁帮紝浣嗘槸缁撴灉鏄痜loat鍨嬶紝鍥犳涓嶈兘鐩存帴鐢ㄦ暣褰㈣繘琛岃绠楋紝浼氶粯璁よ浆鍖栦负鏁村舰缁撴灉锛屼涪澶卞皬鏁伴儴鍒嗐
绛旓細include<stdio.h>int main(){int i=0,j=0,temp=0;while(i<5){j=0;while(j<=i){temp++;j++;printf("%d ",temp);}printf("\n");i++;}}
绛旓細include "stdio.h"main(){int x=2;while(x--);printf("%d",x);} 鏄繖鏍峰惂銆傚棷锛岄鍏堟槸x=2杩涘叆锛屾帴鐫x鑷噺涓1锛涙帴鐫x=1杩涘叆锛寈鑷噺涓0锛涘綋x涓0鏃惰繘鍘伙紝x杩樻槸浼氳繘琛岃嚜鍑忎负-1;鐒跺悗寰幆灏辫缁堟浜嗐備笂闈--鏄痻鍙備笌杩愮畻鍚庯紝瑕佽嚜鍑1锛涙墍浠hile(x--),灏辩畻x涓0锛屼篃鏄弬涓庤繍绠椾簡锛岃...
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绛旓細include <stdio.h>void main( ) { int a; int i; a=50; i=2; while(a<100) { while(i=a-1) printf("%d\n",a); a=a+1; i=2; //璁板緱鍦╳hile寰幆涓i鍒濆鍖栵紒锛 }}
绛旓細include<stdio.h>double fac(int n){double f=1; while(n)f*=n--; return f;}int main(){printf("%.0lf\n",fac(20)); return 0;}
绛旓細include<stdio.h> int main(){ int i=1,n;double s=0;scanf("%d",&n);while(i<=n)s+=i%2?1.0/i++:-1.0/i++;printf("%f\n",s);return 0;}
绛旓細鍙互鍟 i = 1;while(i < 5){ j = 1;while(j < 5){ k =1;while(k < 5){ if(...){ ...}//if涓嶅彉 k++;} j++;} i++;}
绛旓細2瀵瑰簲98 ...杈撳叆鑼冨洿搴旇鍦1-26涔嬮棿, 瓒呰繃杩欎釜鍖洪棿鐨勬暟灏变涪寮 int i;do{ fflush(stdin); //娓呯┖杈撳叆缂撳啿鍖 scanf("%d",&i); if(i<1 || i>26) { continue; } printf("%c",i+96);}while(i==0) //杈撳叆0鏃剁粨鏉 ...
