getchar() in a while loop Question
I am a newbee writing a C program for school where the input is redirected to a file. I am to use getchar()
only to retrieve the information. I am using Windows Visual 2008 and I cannot figure out why my code will not exit the loop. Can anyone help 开发者_Python百科me out? Thanks.
while (rec != 'EOF')
{
while (rec != '\n')
{
variable=getchar;
printf ("this is variable %c");
}
}
while (rec != EOF)
{
rec=getchar();
if((rec != '\n') && (rec != EOF)){
printf ("this is variable %c\n",rec);
}
}
int c = 0;
while (c != EOF) {
c = getchar();
if (c == '\n')
break;
printf("c:%c\n", c);
}
The answer depends on what is really needed. If you want to print every character except the new lines, you want something like:
int c = getchar(); // Note c is defined as an int otherwise the loop condition is broken
while (c != EOF)
{
if (c != `\n`)
{
printf("c:%c\n", c);
}
c = getchar();
}
If you just want the characters on the first line:
int c = getchar();
while (c != EOF && c != `\n`)
{
printf("c:%c\n", c);
c = getchar();
}
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