C - 数字总和

Question

为什么我的程序不能运行？它应该从公式 1-(1/2)+(1/3)...+(1/999)-(1/1000)=

#include <stdio.h>
#include <math.h>
int main () {
 int i, j;
 float  suma;
 suma = 0.f;
 for (i=0; i<1000; i++) {
    if (i%2==0) {
        suma=suma - 1/i;
    } else {
        suma=suma + 1/i;
    }
 }
 printf("%f", suma);

}

Answer 1

除以零!!

int main () {
 int i;
 float  suma;
 suma = 0.0f; 
 for (i=1; i<1000; i++) {  //fix loop, start from 1
    if (i%2==0) {
        suma=suma - 1.0f/i; // Use 1.0, (1/i will be evaluated as int)
    } else {
        suma=suma + 1.0f/i;
    }
 }
 printf("%f", suma);

}