C语言程序设计经典题目大汇总.doc

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