C语言开发环境使用和编程初体验
#include <stdio.h> int main() { printf(" o o\n"); printf("<H> <H>\n"); printf("I I I I\n"); return 0; }
task2.c
#include <stdio.h> int main() { printf(" o\n"); printf("<H>\n"); printf("I I\n"); printf(" o\n"); printf("<H>\n"); printf("I I\n"); return 0; }
实验任务二
#include <stdio.h> int main() { int n, sum; scanf("%d", &n); sum = n/2*(n+1); printf("sum = %d\n", sum); return 0; }
写法三不能实现题目要求,该写法先算(n+1)再×2最后/n 计算错误
#include <stdio.h> int main() { int n, sum; scanf("%d", &n); sum = (n+1)/2*n; printf("sum = %d\n", sum); return 0; }
写法四不能实现题目要求,该写法先算(n+1)再算n×2 最后两者再相除 计算错误
实验任务3
#include <stdio.h> int main() { int a, b, t; a = 3; b = 4; printf("a = %d, b = %d\n", a, b); t = a; a = b; b = t; printf("a = %d, b = %d\n", a, b); return 0; }
功能:对t进行赋值,t=a=3,再对a进行赋值,a=b=4,最后对b进行赋值,b=t=3.结果以十进制整数的形式输出。
实验任务4
#include <stdio.h> int main() { int x, t, m; x = 123; printf("x = %d\n", x); t = 0; m = x % 10; t = t *10 + m; x = x / 10; m = x % 10; t = t * 10 + m; x = x / 10; m = x % 10; t = t * 10 + m; x = x / 10; printf("t = %d\n", t); return 0; }
功能:将个位,十位,百位数字颠倒
实验任务5
#include <stdio.h> int main() { float a, b, c; scanf("%f%f%f", &a, &b, &c); if(a+b>c&&a+c>b&&b+c>a) printf("能构成三角形\n"); else printf("不能构成三角形\n"); return 0; }
实验任务6
#include <stdio.h> int main() { int year; year = 1e+009/(3600*24*365); printf("10亿秒约等于%d年\n", year); return 0; }
实验任务7
#include <stdio.h> #include <stdlib.h> #include <time.h> int main() { int n; srand((unsigned)time(NULL)); n = rand() % 41 + 60; printf("n = %d\n", n); return 0; }
实验任务8
#include <stdio.h> int main() { char ans1, ans2; printf("每次课前认真预习、课后及时复习了没?(输入y或Y表示有,输入n或N表示没有) :"); ans1 = getchar(); getchar(); printf("\n动手敲代码实践了没?: "); ans2 = getchar(); if((ans1 == 'y' || ans1 == 'Y') && (ans2 == 'y' || ans2 == 'Y')) printf("\n罗马不是一天建成的,继续保持哦~\n"); else printf("\n罗马不是一天毁灭的,我们来建设吧!\n"); }
结论:C 语言语法规则运用不熟练。