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by POP Fan on August 20th, 2009
scanf() reads values specified as arguments from stdin, whereas sscanf reads them from an array specified in the first argument. fscanf reads from the FILE pointer entered as argument 1.
For example:
int a;
scanf("%d", &a);
would store an integer value received from stdin (which is usually the keyboard) at the address of variable a.
int a;
int b[10];
register int c;
for(c=0; c<10; c++)
b[c] = c;
sscanf(b, "%d", &a);
would do the same thing but would read the values from the array b instead of stdin. A would then equal: 0123456789.
FILE *fname;
int a;
if((fname=fopen("temp.txt", "r"))==NULL)
{
printf("nFile read error.");
exit(1);
}
fscanf(fname, "%d", &a);
would be the same as the above examples, except the value would be read from the file temp.txt.
scanf is used for input from the keyboard (mostly)
sscanf is used for input from an array
fscanf is used for input from a file
by kitiara on March 15th, 2009
f rather than s at the beginning??...
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