穷人的调试器一 printf 思路：用printf>将所有怀疑有错误的数据打印 出来观察 1 int main() 2 3 int n; 4 double pi,i,j; 5 printf("Please input wanted loading minute:\n"); 6 scanf("%d",&n); 7 for(pi=0.0,i=1.0,j=1.0;1<n;i+=2,j=-j) 8 9 printf("%1f\n",j); 10 pi+=(17(1*j); 11 12 pi*=4; 13 printf("The value of pi is%lf",pi); 14 return 0; 15} 思路：用printf将所有怀疑有错误的数据打印 出来观察 穷人的调试器 —— printf 7 1 int main() 2 { 3 int n; 4 double pi, i, j; 5 printf("Please input wanted loading minute:\n"); 6 scanf("%d", &n); 7 for (pi = 0.0, i = 1.0, j = 1.0; i < n; i += 2, j = -j) 8 { 9 printf("%lf\n", j); 10 pi += (1 / (i*j)); 11 } 12 pi *= 4; 13 printf("The value of pi is%lf", pi); 14 return 0; 15 }