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#includeint main(void){ double value1,value2; char op; printf("Type in an expression:"); scanf("%lf%c%lf",&value1,&op,&value2); if(op=='+') printf("=%.2f\n",value1+value2); else if(op=='-') printf("=%.2f\n",value1-value2); else if(o 阅读全文
posted @ 2013-10-02 22:12
wuyanlong
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#includeint main(void){ double x,y; printf("Enter x:"); scanf("%lf",&x); if(x<0){ y=0; } else if(x<=15){ y=4*x/3; } else{ y=2.5*x-10.5; } printf("f(%.2f)=%.2f\n",x,y); return 0;} 阅读全文
posted @ 2013-10-02 22:07
wuyanlong
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#includeint main(void){ int count,i,n; double grade,total; printf("Enter n:"); scanf("%d",&n); total=0; count=0; for(i=1;i<=n;i++){ printf("Enter grade#%d:",i); scanf("%lf",&grade); total=total+grade; if(grade<60){ count++; } } ... 阅读全文
posted @ 2013-10-02 22:05
wuyanlong
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#includeint main(void){ int number; printf("Enter a number:"); scanf("%d",&number); if(number%2==0){ printf("The number is even.\n"); } else{ printf("The number is odd.\n"); } return 0;} 阅读全文
posted @ 2013-10-02 22:00
wuyanlong
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#includeint main(void){ int mynumber=38; int yournumber; printf("Input your number:"); scanf("%d",&yournumber); if(yournumber==mynumber) printf("OK!you are right!\n"); else if(yournumber>mynumber) printf("Sorry!your number is bigger than my number!\n"); 阅读全文
posted @ 2013-10-02 21:59
wuyanlong
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#includedouble fact(int n);int main(void){ int i,n; double result; printf("Enter n:"); scanf("%d",&n); for(i=0;i<=n;i++){ result=fact(i); printf("%d!=%.0f\n",i,result); } return 0;}double fact(int n){ int i; double product; product=1; for(i=1;i<=n;i++){... 阅读全文
posted @ 2013-10-02 21:54
wuyanlong
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/* 调用幂函数pow()生成乘方表 */#include#include /* 程序中调用了数学函数，需包含头文件math.h */int main(void){ int i,n; double power; printf("Enter n:"); /* 输入提示 */ scanf("%d",&n); for(i=0;i<=n;i++){ power=pow(2,i); /* 调用幂函数pow(2,i)计算2的i次方 */ printf("pow(2,%d)=%... 阅读全文
posted @ 2013-10-02 21:47
wuyanlong
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#includeint main(void){ int i,n; double product; printf("Enter n:"); scanf("%d",&n); product=1; for(i=1;i<=n;i++){ product=product*i; } printf("product=%.0f\n",product); return 0;} 阅读全文
posted @ 2013-10-02 21:42
wuyanlong
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/* 计算1-1/3+1/5-1/7+…共n项之和 */#includeint main(void){ int denominator,flag,i,n; double item,sum; printf("Enter n:"); /*输入提示*/ scanf("%d",&n); /*执行循环前，给变量赋初值*/ flag=1; /*flag表示第i项符号，初始为正*/ denominator=1; /*denominator表示第i项的分母，初值为l*/ sum=0; ... 阅读全文
posted @ 2013-10-02 21:38
wuyanlong
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/*计算1+2+3+…+n*/#includeint main(void){ int i,n,sum; printf("Enter n:"); /*输入提示*/ scanf("%d",&n); /*调用scanf()函数输入n*/ sum=0; /*置累加和sum的初值为0*/ for(i=1;i<=n;i++){ /*循环执行n次*/ sum=sum+i; /*反复累加i值*/ } /*输出累加和... 阅读全文
posted @ 2013-10-02 21:31
wuyanlong
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#include int 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... 阅读全文
posted @ 2013-10-02 21:25
wuyanlong
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#include#include int main(void){ int money,year; double rate,sum; printf("Enter money:"); scanf("%d",&money); printf("Enter year:"); scanf("%d",&year); printf("Enter rate:"); scan... 阅读全文
posted @ 2013-10-02 21:16
wuyanlong
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/*计算二分段函数*/#includeint main(void){ double x,y; /*定义两个双精度浮点型变量*/ printf("Enter x(x>=0)：\n"); /*输入提示*/ /*调用scanf()函数输入数据，变量名x前面要加&,%lf中的l是首写字母*/ scanf("%lf,&x"); /*if-else语句*/ if(x<=15){ y=4*x/3; } else{ y=2.5*x-10.5; } printf("y=f(%f)=%... 阅读全文
posted @ 2013-10-02 20:59
wuyanlong
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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 20:51
wuyanlong
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/*显示两行文字*/#includeint main(viod){ printf(“Programming is fun.\n”); printf(“And programming in C is even more fun!\n”); return0;} 阅读全文
posted @ 2013-10-02 20:32
wuyanlong
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/*显示“Hello World！”*/ /*注释文本*/#include /*编译预处理命令*/ int main(void) /*定义主函数main()*/ { printf("Hello World!\n"); /*调用printf()函数输出文字*/ return0; /*返回一个整数0*/} 阅读全文
posted @ 2013-10-02 20:28
wuyanlong
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