1-1/2+1/3-1/4...1/100

# include <stdio.h> int main(void) { float sigh, sum=1, term, i; for (i=2; i<=100; ++i) { term=(-1)*(1/i); sum=sum+term; ++i; sigh=1/i; sum=sum+sigh; } printf("%f\n", sum); return 0; }结果:0.698073
对么????

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