#include <stdio.h> void main( ) { int i,b = 1; double s; (s = 0);/*对初始值赋值*/ for(i = 1; i <= 15; i++) { s = s +double(i)/double(b);/*对s重新计算*/ b=b+2;/*对b进行赋值*/ } printf("%f\n", s);/*实数型输出结果*/ }