C语言中的isupper（）函数-yiteyi-C++库

C编程中的isupper（）函数检查给定字符是否为大写。isupper（）函数是在ctype中定义的。h头文件。

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语法：

int isupper ( int x );

例如：

Input: AOutput: Entered character is uppercase characterInput: aOutput: Entered character is not uppercase characterInput: 1Output: Entered character is not uppercase character

C

                         // C program to demonstrate                       
                         // isupper() function                       
                         #include <ctype.h>                       
                         #include <stdio.h>                       
                         int                                     main()                       
                         {                       
                                                 char                                     ch =                                     'A'                                     ;                       
           
                                                 // checking uppercase                       
                                                 if                                     (                                     isupper                                     (ch))                       
                                                 printf                                     (                                     "Entered character is uppercase character"                                     );                       
                                                 else                       
                                                 printf                                     (                                     "Entered character is not uppercase character"                                     );                       
                         }                       

输出：

Entered character is uppercase character

申请： C语言中的isupper（）函数用于计算给定句子中出现的大写字母总数。 例子：

Input: GEEKSFORGEEKSOutput: Number of upper case present in the sentence is : 13Input: GeeksFORGeeksOutput: Number of upper case present in the sentence is : 5Input: geeksforgeeksOutput: Number of upper case present in the sentence is : 0

C

                         // C program to demonstrate                       
                         // isupper() function                       
           
                         #include <ctype.h>                       
                         #include <stdio.h>                       
           
                         // called function                       
                         int                                     ttl_upper(                                     int                                     i,                                     int                                     counter)                       
                         {                       
                                                 char                                     ch;                       
                                                 char                                     a[50] =                                     "GeeksForGeeks"                                     ;                       
                                                 ch = a[0];                       
           
                                                 // counting of upper case                       
                                                 while                                     (ch !=                                     ' '                                     ) {                       
                                                 ch = a[i];                       
                                                 if                                     (                                     isupper                                     (ch))                       
                                                 counter++;                       
           
                                                 i++;                       
                                                 }                       
           
                                                 // returning total number of upper case present in sentence                       
                                                 return                                     (counter);                       
                         }                       
                         int                                     main()                       
                         {                       
                                                 int                                     i = 0;                       
                                                 int                                     counter = 0;                       
           
                                                 // calling function                       
                                                 counter = ttl_upper(i, counter);                       
                                                 printf                                     (                                     "Number of upper case present in the sentence is : %d"                                     , counter);                       
                                                 return                                     0;                       
                         }                       

输出：

Number of upper case present in the sentence is : 3

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