21 lines
366 B
C
21 lines
366 B
C
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#include <stdio.h>
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#include <ctype.h>
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void main()
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{
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FILE *fp;
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int c;
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long value;
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fp = fopen( "file", "r" );
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value = 0;
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c = fgetc( fp );
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while( isdigit(c) ) {
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value = value*10 + c - '0';
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c = fgetc( fp );
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}
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ungetc( c, fp ); /* put last character back */
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printf( "Value=%ld\n", value );
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fclose( fp );
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}
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