C语言程序设计经典题目大汇总.doc
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第一章
1．main()
{printf(“************************”n”);
printf(“ welcome you \n”);
printf(“ very good \n”);
printf(“************************\n”);
}
2.输个数输数main()
{int a,b,c,t;
int max(int x,int y);
printf(“please input three numbers:”);
scanf(“%d,%d,%d”,a,b,c);
t=max(max(a,b),c);
printf(“max number is:%d\n”,t);
}
int max(int x,int y)
{int z;
if(xy)z=x;
else z=y;
return(z);
}
第二章
1．已知三个数812，6，按公式s=a+b*c计显结#includestdio.h
main()
{
int a,b,c,s;
a=8;b=12;c=6;
s=a+b*c;
printf(“s=%d\n”,s);
}
2.整形变数赋main()
{int x,y,z,w;
unsigned int k;
x=10;y=-20;k=30;
z=x+k;w=y+k;
printf(“x+k=%d,y+k=%d\n”,z,w);
}
3.字符型变义赋main()
{char c1,c2;
c1=’a’;c2=’b’;
c1=c1-32;c2=c2-32;
printf(“%c %c”,c1,c2);
}
第三章
1.复合语#includestdio.h
main()
{int x=1,y=2;
{int x=2;
{int x=3;
printf(“x=%d,y=%d\n”,x,y);
}
printf(“x=%d,y=%d\n”,x,y);
}
printf(“x=%d,y=%d\n”,x,y);
}
2.字符输数#includestdio.h
main()
{int i=97;
char ch=’a’;
putchar(i);
putchar(‘\n’);
putchar(ch);
}
3.字符输数#includestdio.h
main()
{int ch;
ch=getchar();
putchar(ch);
}
4.输圆径输长积#includestdio.h
void main()
{ float r,l,s;
scanf(“%f”,r);
l=2*3.14159*r;
s=3.14159*r*r;
printf(“\nl=%8.4f”,l);
printf(“\ns=%8.4f’,s);
}
5.输个将们输#includestdio.h
{ char ch1,ch2,ch3;
ch1=getchar();
ch2=getchar()l;
ch3=getchar();
putchar(ch3);putchar(ch2);putchar(ch1);
}
6.用格式输数输个用输数输3个们ASCII码#includestdio.h
void main()
{char ch1,ch2,ch3;
scanf(“%c%c%c”,ch1,ch2,ch3);
printf(“%c,%d\n”,ch3,ch3);
printf(“%c,%d\n”,ch2,ch2);
printf(“%c,%d\n”,ch1,ch1);
}
7.输个数们void main()
{int num1,num2,num3;
float average;
printf(“Please input three numbers:”);
scanf(“%d,%d,%d”,num1,num2,num3);
average=(num1+num2+num3)/3.0;
printf(“average=%7.2/n”,average);
}
8.求方程a*x*x+b*x+c=0的实数#include”math.h”
void main()
{float a,b,c,disc,x1,x2;
prinf(“input a,b,c:”);
scanf(“%f,%f,%f”,a,b,c”);
disc=b*b-4*a*c;
x1=(-b+sqrt(disc))/(2*a);
x2=(-b-sqrt(disc))/(2*a);
printf(“\nx1=%6.2f\nx2=%6.2f\n”,x1,x2);
}
9.从键盘输个写写输出该include”stdio.h”
void main()
{char a;
printf(“input a lowercase
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