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Putc

Item Value Header filestdio.h Declarationint putc(int ch, FILE *stream); Functionwrites a character to the output stream. Returnreturns the character written on success and EOF on error. For binary mode, you can use ferror() to determine whether an error has occurred. #include <stdio.h>     int main(void){       FILE *fp;     if((fp=fopen("test", "w"))==NULL) {       printf("Cannot open file.\n");       exit(1);     }        char *str = "www.rntsoft.com";       for(; *str; str++){         putc(*str, fp);     }   }