string can't convert lowercase to upper case as c program

Question

How can I convert a string using the toupper function? This did not work.

#include<stdio.h>
#include<string.h>
#include<ctype.h>

int main(){
    char ch[20];
    printf("\nEnter Your String :");
    gets(ch);

    int i=0;
    for(i=0;ch[i] !='\0';i++)
    {
        putchar(toupper(ch[i]));
        putchar(ch[i]);
    }

    return 0;
}

this program output both upper and lowercase i just want to uppercase output.i cant catch my logic fault.please help me to get clear logic concept

How does it not work? What output do you expect, and what do you get? — Some programmer dude, Sep 15 '12 at 10:45

score 0 · Accepted Answer · answered Sep 15 '12 at 10:55

0

I think This will work

for(i=0;ch[i] !='\0';i++)
{
    ch[i]=toupper(ch[i]);
}

//print the string with uppercase

answered Sep 15 '12 at 10:55

Rajan

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string can't convert lowercase to upper case as c program

1 Answers1