一道C语言的基础题:输入一个小写字母，然后转换成大写，比如在输入时候是“a”，输出的时候是“A”。 C语言基础问题[输入的A到Z的字母，大写变小写，小写变大写。...
C\u8bed\u8a00\u9898\u76ee\u63cf\u8ff0\uff1a \u4ece\u952e\u76d8\u4e0a\u8f93\u5165\u4e00\u4e2a\u5c0f\u5199\u5b57\u6bcd\uff0c\u7136\u540e\u5c06\u5c0f\u5199\u5b57\u6bcd\u88c5\u6362\u6210\u5927\u5199\u5b57\u6bcd\u8f93\u51fa\uff01\u53ef\u4ee5\u53c2\u8003\u4e0b\u9762\u7684\u4ee3\u7801\uff1a
#include
void main()
{
char ch;
scanf("%c",&ch);
if(ch>='A'&&ch<='Z')
{
ch=ch+32;
printf("%c\n\n",ch);
}else{
printf("%c\n\n",ch);
}
}
\u6269\u5c55\u8d44\u6599\uff1a
1\u3001printf()\u51fd\u6570
printf()\u51fd\u6570\u662f\u683c\u5f0f\u5316\u8f93\u51fa\u51fd\u6570, \u4e00\u822c\u7528\u4e8e\u5411\u6807\u51c6\u8f93\u51fa\u8bbe\u5907\u6309\u89c4\u5b9a\u683c\u5f0f\u8f93\u51fa
\u4fe1\u606f\u3002\u5728\u7f16\u5199\u7a0b\u5e8f\u65f6\u7ecf\u5e38\u4f1a\u7528\u5230\u6b64\u51fd\u6570\u3002\u51fd\u6570\u7684\u539f\u578b\u4e3a\uff1a
int printf(const char *format, ...);
\u51fd\u6570\u8fd4\u56de\u503c\u4e3a\u6574\u578b\u3002\u82e5\u6210\u529f\u5219\u8fd4\u56de\u8f93\u51fa\u7684\u5b57\u7b26\u6570\uff0c\u8f93\u51fa\u51fa\u9519\u5219\u8fd4\u56de\u8d1f\u503c\u3002
2\u3001if\u8bed\u53e5
\u662f\u6307\u7f16\u7a0b\u8bed\u8a00\uff08\u5305\u62ecc\u8bed\u8a00\u3001C++\u3001C#\u3001java\u3001VB\u3001\u6c47\u7f16\u8bed\u8a00\u7b49\uff09\u4e2d\u7528\u6765\u5224\u5b9a\u6240\u7ed9\u5b9a\u7684\u6761\u4ef6\u662f\u5426\u6ee1\u8db3\uff0c\u6839\u636e\u5224\u5b9a\u7684\u7ed3\u679c\uff08\u771f\u6216\u5047\uff09\u51b3\u5b9a\u6267\u884c\u7ed9\u51fa\u7684\u4e24\u79cd\u64cd\u4f5c\u4e4b\u4e00\uff0cif\u7684\u8fd4\u56de\u503c\u4e3a\u771f\u6216\u5047\uff0c\u53ef\u4ee5\u7528bool\u578b\u53d8\u91cf\u8fdb\u884c\u5b58\u50a8\uff0c\u5360\u7528\u4e00\u5b57\u8282\u3002
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-printf()
\u53c2\u8003\u8d44\u6599\u6765\u6e90\uff1a\u767e\u5ea6\u767e\u79d1-if\u8bed\u53e5
#include
#include
void main()
{
char sz[200];
printf("\u8bf7\u8f93\u5165\u5b57\u7b26\u4e32\uff08\u4e0d\u80fd\u8d85\u8fc7200\u4e2a\u5b57\u7b26\uff09\uff1a");
scanf("%s",sz);
char* t = sz;
while( *t != '\0')
{
if( *t>'a' && *t<'z' ) //\u5047\u8bbe\u8f93\u5165\u7684\u5168\u90e8\u662f\u5b57\u7b26\u6ca1\u6709\u6570\u5b57
{
*t -= 32;
}
else
{
*t += 32;
}
t++;
}
printf("%s",sz);
}
char a_to_A(char a)
{
return (a-32);
}接受输入的数，调用这个函数，然后输出函数返回值就好了
#inlcude <stdio.h>
int main()
{
char c;
while((c = getchar()) != EOF);
printf("%c\n", c - 32);
return 0;
}
绛旓細杈撳叆瀛樺偍鍒板瓧绗︿覆锛岀劧鍚庨愪竴鍒ゆ柇锛屽垹闄や笉鍚堟硶鐨勫瓧绗﹀嵆鍙備竴銆佺畻娉曞垎鏋愶細1銆佽緭鍏ュ瓧绗︿覆銆2銆侀愪竴鍒ゆ柇鏄惁鍚堟硶锛屽鏋滀笉鍚堟硶锛屽垯鍒犻櫎銆傚垹闄ゆ柟娉曞彲浠ヤ娇鐢ㄥ悗缁瓧绗﹁鐩栧綋鍓嶅瓧绗︺3銆佸彲浠ヤ粠鍓嶅悜鍚庨亶鍘嗭紝姣涓涓涓嶅悎娉曞瓧绗﹂兘琚悗缁悎娉曞瓧绗﹁鐩栵紝杩欐牱涓娆″惊鐜嵆鍙畬鎴愭墍鏈夋搷浣溿備簩銆佸弬鑰冧唬鐮侊細include <stdio.h>int ...
绛旓細include<stdio.h> void main(){ char a;int num1=0;int num2=0;printf("杈撳叆涓涓插瓧绗︼紝浠#缁撳熬:");while((a=getchar())!='#'){ if((a>=65)&&(a<=90))num1++;else if((a>=97)&&(a<=122))num2++;} printf("澶у啓瀛楁瘝鏁颁负:%d,灏忓啓瀛楁瘝鏁颁负:%d\n",num1,num2);} ...
绛旓細绛旀锛歩nt Total;scanf("%d", &Total);//鐧句綅int m = Total / 100;int n = Total - m * 100;n = n / 10;int t = Total % 10;//m n t鍒嗗埆涓虹櫨浣 鍗佷綅 涓綅 姹傚拰int nRet = m + n + t;1銆C璇█鏄竴绉嶈绠楁満绋嬪簭璁捐璇█銆傚畠鏃㈡湁楂樼骇璇█鐨鐗圭偣锛屽張鍏锋湁姹囩紪璇█鐨勭壒鐐广傚畠...
绛旓細char s[50]={'\0'};char t[50]={'\0'};char c;int i=0,j=0;scanf("%s",s);fflush(stdin);scanf("%c",&c);while(1){if(s[i]==c){i++;continue;}else if(s[i]=='\0'){break;}t[j++]=s[i++];}printf("%s",t);
绛旓細include <stdio.h>void main(){int i,j,n,k=1;scanf("%d",&n);for(i=1;i<=n;i++){for(j=2;j
绛旓細include<stdio.h> include<math.h> int main(){ int i,num,n,ans,tt;while(scanf("%d",&num)!=EOF){ ans=0;n=3;//濡傛灉瑕佹眰N浣嶆暟鍙嶈浆锛屾妸n鏀逛簡灏卞ソ浜 while(n!=0){ tt=num%10;num/=10;ans+=tt*pow((double)(10),(double)(--n));} printf("%d\n",ans);} return 0;}...
绛旓細浠ｇ爜璧勬枡锛歩nclude "stdio.h"include "limits.h"void myout(unsigned n){ unsigned k;for(k=~INT_MAX;k>0;k>>=1)printf("%d",n&k || 0);} int main(int argc,char *argv[]){ int n;printf("Enter n(int)...\nn=");if(scanf("%d",&n)!=1){ printf("Input error, exit.....
绛旓細include<stdio.h> main(){ int input;printf("璇杈撳叆涓涓鏁存暟锛歕n");scanf("%d",&input);if(input==1)printf("Good morning\n");else if(input==2)printf("Good afternoon\n");else if(input==3)printf("Good evening\n");else if(input==4)printf("Good nignt\n");else printf(...
绛旓細i<strlen(s) && i<n
绛旓細涓锛歩nclude <stdio.h> void main(){ int a,i=0,sum=0;scanf("%d",&a);while(a){ sum+=(a%10);//sum鏄釜浣嶆暟涔嬪拰 a/=10;i++;//i涓轰綅鏁 } printf("%d浣嶆暟, 鍚勪綅鏁板瓧涔嬪拰涓%d\n",i,sum);} 浜岋細include <stdio.h> int issxh(int number){ int x1,x2,x3;x1=number/...
