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#includeint main(void){ int denominator,flag,i,n; double item,sum; printf("Enter n:"); scanf("%d",&n); flag=1; denominator=1; sum=0; for(i=1;i<=n;i++){ item=flag*1.0/denominator; sum=sum+item; flag=-flag; denominator=denominator+2; } printf("sum=%f\n",sum); retur 阅读全文
posted @ 2013-10-02 17:00
huangsilinlana
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通过例题2-7，i=1还是i=l的一次次反复错误导致难以运行，我懂得了输完程序并不只是盯着程序看，还应该看看例题中提示，真正明白表达式是什么意思。 阅读全文
posted @ 2013-10-02 16:50
huangsilinlana
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#includeint main(void){ int i,n,sum; printf("Enter n:"); scanf("%d",&n); sum=0; for(i=1;i<=n;i++){ sum=sum+i; } printf("Sum of numbers from 1 to %d is %d\n",n,sum); return 0;} 阅读全文
posted @ 2013-10-02 16:45
huangsilinlana
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学习了例2-5以后，我知道了调用数学函数需要加入#include,并且初步了解了计算银行存款本息的程序。 阅读全文
posted @ 2013-10-02 16:22
huangsilinlana
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#include#includeint main(void){ int money,year; double rate,sum; printf("Enter money:"); scanf("%d",&money); printf("Enter year:"); scanf("%d",&year); printf("Enter rate:"); scanf("%lf",&rate); sum=money*pow(1+rate,year); printf 阅读全文
posted @ 2013-10-02 16:19
huangsilinlana
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打完例2-6后，我知道了在for语句中的fahr++相当于fahr=fahr+1. 阅读全文
posted @ 2013-10-02 16:05
huangsilinlana
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#includeint main(void){ int fahr,lower,upper; double celsius; printf("Enter lower:"); scanf("%d",&lower); printf("Enter upper:"); scanf("%d",&upper); printf("fahr celsius\n"); for(fahr=lower;fahr<=upper;fahr++){ celsius=(5.0/9.0)*(fahr-32) 阅读全文
posted @ 2013-10-02 16:02
huangsilinlana
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#includeint main(void){ double x,y; printf("Enter x(x>=0):\n"); scanf("%lf",&x); if(x<=15){ y=4*x/3; } else{ y=2.5*x-10.5; } printf("y=f(%f)=%.2f\n",x,y); return 0;} 阅读全文
posted @ 2013-10-02 15:10
huangsilinlana
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#includeint main(void){ int celsius,fahr; fahr=100; celsius=5*(fahr-32)/9; printf("fahr=%d,celsius=%d\n",fahr,celsius); return 0;} 阅读全文
posted @ 2013-10-02 15:00
huangsilinlana
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#includeint main(void){ printf("Programming is fun.\n"); printf("And programming in C is even more fun!\n"); return 0;} 阅读全文
posted @ 2013-10-02 14:51
huangsilinlana
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