求s的值,x,y由用户从键盘输入。
s=(x+2)(y+3)+(x+22)(y+33)+(x+222)(y+333)+(x+2222)(y+3333)
…+(x+2^10)*(y+3^10)
供参考:
#include <stdio.h>
int main()
{
int x,y,i;
double t2 = 0,t3 = 0;
double s = 0;
scanf("%d%d", &x, &y);
for (i = 1;i <= 10;i++){
t2 = t2*10 + 2;
t3 = t3*10 + 3;
s += (x+t2)*(y+t3);
}
printf("%f", s);
return 0;
}
c语言加减乘除:
#include <stdio.h>
int main()
{
int a = 12;
int b = 100;
float c = 8.5;
int m = a + b;
float n = b * c;
double p = a / c;
int q = b % a;
printf("m=%d, n=%f, p=%lf, q=%d\n", m, n, p, q);
return 0;
}
获取用户输入:
#include<stdio.h>
int main()
{
int a;
printf("请输入一个值\n");
scanf("%d", &a);
printf("你刚刚输入了:%d\n", a);
system("pause");
return 0;
}