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  • 例题第6章

    6.1

    #include<stdio.h>
    int main(void)
    {
        int i;
        char ch_lower,ch_upper;
        for(i=1;i<=6;i++)
        {
            scanf("%c",&ch_lower);
            if(ch_lower>='a'&&ch_lower<='z')
                ch_upper=ch_lower-'a'+'A';
            printf("%c->%c->%d
    ",ch_lower,ch_upper,ch_upper%10);
        }
    
        return 0;
    }

    6.2

    #include<stdio.h>
    int main(void)
    {
        char ch='w';
        int a =2,b=3,c=1,d,x=10;
    
        printf("%d",a>b==c);
        printf("%d",d=a>b);
        printf("%d",ch>'a'+1);
        printf("%d",d=a+b>c);
        printf("%d",b-1==a!=c);
        printf("%d
    ",3<=x<=5);
    
        return 0;
    }

    6.3

    #include<stdio.h>
    int main(void)
    {
        char ch='w';
        int a=2,b=0,c=0;
        float x=3.0;
    
        printf("%d",a&&b);
        printf("%d",a||b&&c);
        printf("%d",!a&&b);
        printf("%d",a||3+10&&2);
        printf("%d",!(x == 2));
        printf("%d",!x == 2);
        printf("%d
    ",ch||b);
    
        return 0;
    }

    6.5

    #include<stdio.h>
    int main(void)
    {
        char ch;
    
        printf("input characters:");
        ch=getchar();
        while(ch!='
    '){
            if(ch>='A'&&ch<='Z')
                ch=ch-'A'+'a';
            else if(ch>='a'&&ch<='z')
                ch=ch-'a'+'A';
            putchar(ch);
            ch=getchar();
        }
        return 0;
    }

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  • 原文地址:https://www.cnblogs.com/simple9495/p/3398959.html
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