新思维：C语言程序设计

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#include <stdio.h>
#include<math.h>
int main()
{
    int sign=1;
    double pi=0.0,n=1.0,term=1.0;
    while(fabs(term)>=1e-6) {
        pi=pi+term;
        n=n+2;
        sign=-sign;
        term=sign/n;
    }
    pi=pi*4;
    printf("pi=%10.8fn",pi);
}

#include <stdio.h> #include<math.h> int main() { int sign=1; double pi=0.0,n=1.0,term=1.0; while(fabs(term)>=1e-6) { pi=pi+term; n=n+2; sign=-sign; term=sign/n; } pi=pi*4; printf("pi=%10.8fn",pi); }