用C语言编程：求1-1/2+1/3-1/4+1/5-1/6+…+1/99-1/100+…的值…

#includeint main(){double y; int i,n; double s=0,t=1; for(i=1;i<101;i++) {s+=t/i; t=-t; } printf("%g\n",s); return 0;}