求sin的：参考下 #include void main() { double x,a,b,sum=0; printf("请输入x的弧度值：\n"); scanf("%lf",&x); int i,j,count=0; for(i=1;;i+=2) { count++; a=b=1; for(j=1;j<=i;j++) { a*=x; b*=(double)j; } if(a/b<0.0000001) break; else { if(count%2==0) sum-=a/b; else sum+=a/b; } } printf("%lf\n",sum); }
