best way to iterate through string

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I am new to C, and I want to iterate through a char array inputted by the user, and print a different predefined variable depending on which letter the loop is currently on.

Right now I have:

C

printf("Please enter your name: ");
scanf("%20[0-9a-zA-Z ]", nameVal);
printf("\n");

for (i = 0; nameVal[i] != '\0'; i++) {

What would my if statement look like?

I basically want to say "if the current letter in nameVal is "a", print char A"

Thanks in advance.

Posted 13-Sep-15 21:00pm

shanewignall

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OriginalGriff · Accepted Answer · 2015-09-13T21:26:00

Well, you could try:

C++

for (i = 0; nameVal[i] != '\0'; i++) 
   {
   if (nameVal[i] == 'a') printf("A");
   if (nameVal[i] == 'b') printf("B");
...
   }

Or better:

C#

for (i = 0; nameVal[i] != '\0'; i++)
   {
   switch(nameVal[i])
      {
      case 'a':
         printf("A");
         break;
      case 'b':
         printf("B");
         break;
...
      }
   }

But...this may be better:

C#

for (i = 0; nameVal[i] != '\0'; i++)
   {
   if ((nameVal[i] >= 'a') && (nameVal[i] <= 'z'))
       printf("%c", nameVal[i] + ('A' - 'a'));
   }