蓝桥杯省赛备战笔记——（二）字符串和日期——练习题

#include<stdio.h>
#include<string.h>
char s[105];
int main(){
    int len, cnt = 0;
    scanf("%s",s);
    len = strlen(s);
    for(int i = 0;i < len;i++){
        if(s[i] == ‘A‘)
            cnt++; 
    }
    printf("%d",cnt);
    return 0;
}

#include<stdio.h>
#include<string.h>
char s[105], ans[105];
int max;
int main(){
    int N,len;
    scanf("%d",&N);
    while(N--){
        scanf("%s",s);
        len = strlen(s);
        if(len > max){
            max = len;
            strcpy(ans,s);
        }
    }
    printf("%s",ans);    
    return 0;
} 

#include<stdio.h>
#include<string.h>
char s[1005];
int main(){
    int len;
    scanf("%s",s);
    len = strlen(s);
    for(int i =0; i < len;i++){
        if(s[i] == ‘z‘){
            s[i] = ‘a‘;
        }else if(s[i] == ‘Z‘){
            s[i] = ‘A‘;
        }else if((s[i] >= ‘a‘ && s[i]<= ‘z‘)|| (s[i] >= ‘A‘ && s[i] <= ‘Z‘ )){
            s[i]++;
        } 
    }
    printf("%s",s);
    return 0;
}

#include<stdio.h>
#include<string.h>
char s[10005];
int main(){
    int len;
    scanf("%s",s);
    len = strlen(s);
    if((s[len -1 ] - ‘0‘) % 2 == 0)
        printf("YES");
    else
        printf("NO");
    return 0;
}

#include<stdio.h>
#include<string.h>
char s[100005];
int main(){
    int len;
    scanf("%s",s);
    len = strlen(s);
    for(int i = len- 1;i >= 0;i--)
        printf("%c",s[i]);    
    return 0;
}