. Executable Statements

Transcription

1 Summary of FORTRAN 77 Statements. Executable Statements GO TO (statementlabel,...,statement integer expression IF (condition) executable statement labe!), IF (arithmetic expression) statement label, statement label, statement label ELSE ELSE INQUIRE (FILE=character expression,inquiry specifier list) INQUIRE (UNIT=integer expression, inquiry specifierlist) OPEN (UNIT=integer expression, FILE=character expression, STATUS=character expression) PRINT*, expressionlist PRINT k, expressionlist READ*, variable list READ (unit number,format number) variable list READ k, variable list. READ (unit number,format number, REC=integer expression) variable list RETURN integer expression REWIND (UNIT=integer expression) STOP WRITE {unit number, format number} expressionlist WRITE (unit number, format number, REC=integer expression)expressionlist Reference Page Appendix B 543 Chapter Appendix B 543 Cha pter Chapter Chapter Chapter Chapter Chapter Chapter 2 43 Chapter 2 47 Chapter 2 45 Chapter Chapter Chapter Chapter Chapter Chapter 2 58 Chapter Chapter 9 449

2 -_ Appendix A FORTRAN 77 Intrinsic Functions In the following table of intrinsic functions, the names of the arguments specify their type as indicated below: Argument X CHX DX CX LX IX GX Type real character double precision complex, a + bi logical integer genenc Function type, the second column of the table of intrinsic functions, specifies the type of value returned by the function. i i Generic function names are printed in color. Any type argument that is applicable can be used with generic functions, and the function value returned will be the same type as the input arguments, except for type conversion functions such as REAL and INT. Function Name Function Type Definition SORT (X) Real -IX DSORT(DX) Double precision Jf5X CSORT(CX) Complex JCX ABS(X) Real IXI IABS(lX) Integer IIXI DABS(DX) Double precision IDXI CABS(CX) Complex ICXI EXP(X) Real ex DEXP(DX) Double precision edx CEXP(CX) Complex ecx LOG(GX) Same as GX loge GX ALOG(X) Real loge X DLOG(DX) Double precision loge DX CLOG(CX) Complex loge CX LOG 1O(GX) Same as GX log 10 GX (Continued) FORTRAN 77 Intrinsic Functions I 537

3 II Function Name Function Type Definition ALOG 10(X) Real log10x DLOG 1O(DX) Double precision log10dx REAL(GX) Real Convert GX to real value FLOAT(lX) Real Convert IX to real value SNGL(DX) Real Convert DX to single precision ANINT(X) Real Round to nearest whole number DNINT(DX) Double precision Round to nearest whole number NINT(X) Integer Round to nearest integer IDNINT(DX) Integer Round to,nearest integer AINT(X) Real Truncate X to whole number DINT(DX) Double precision Truncate DX to whole number INT(GX) Integer Truncate GX to an integer IFIX(X) Integer Truncate X to an integer IDINT(DX) Integer Truncate DX to an integer SIGN(X, Y) Real Transfer sign of V to IXI ISIGN(IX, IY) Integer Transfer sign of IV to IIXI DSIGN(DX, DY) Double precision Transfer sign of DV to IDXI MOD(IX, IV) Integer Remainder from IX/IV AMOD(X, Y) Real Remainder from X/V DMOD(DX, DY) Double precision Remainder from DX/DY \ DIM(X, V) Real X - (minimum of X and V) IDIM(lX, IY) Integer IX - (minimum of IX and IV) DDIM(DX, DY) Double precision DX - (minimum of DX and DY) MAX(GX,GY,... ) Same as GX, GV,... Maximum of (GX,GY,... ) MAXO(lX,IV,... ) Integer Maximum of (IX,IV,... ) AMAX1(X,Y,... ) Real Maximum of (X,V,... ) DMAX1(DX,DY,... ) Double precision Maximum of (DX,DV,... ) AMAXO(lX,IY,... ) Real Maximum of (IX,IV,... ) MAX1(X,Y,... ) Integer Maximum of (X,Y,... ) MIN(GX,GY,... ) Same as GX, GV,... Minimum of (GX,GY,... ) MINO(lX,IY,... ) Integer Minimum of (lx,iv,... ) AMIN1 (X,Y,... ) Real Minimum of (X,V,... ) DMIN1(DX,DY,... ) Double precision Minimum of (DX,DV,... ) AMINO(IX,IY,... ) Real Minimum of (lx,iv,... ) MIN1(X,Y,... ) Integer Minimum of (X,V,... ) I. I f\ SIN(X) Real Sine of X, assumes radians DSIN(DX) Double precision Sine of DX, assumes radians I CSIN(CX) Complex Sineof CX, 38 I Appendix A

4 Function Name Function Type Definition COS(X) Real Cosine of X, assumes radians DCOS(DX) Double precision Cosine of DX, assumes radians CCOS(CX) Complex Cosine of CX TAN(X) Real Tangent of X, assumes radians DTAN(DX) Double precision Tangent of DX, assumes radians ASIN(X) Real Arcsine of X DASIN(DX) Double precision Arcsine of DX ACOS(X) Real Arccosine of X DACOS(DX) Double precision Arccosine of DX ATAN(X) Real Arctangent of X DATAN(DX) Double precision Arctangent of DX ATAN2(X,V) Real Arctangent of X/V DATAN2(DX,DV) Double precision Arctangent of DX/DV SINH(X) Real Hyperbolic sine of X DSINH(DX) Double precision Hyperbolic sine of DX COSH(X) Real Hyperbolic cosine of X DCOSH(DX) Double precision Hyperbolic cosine of DX TANH(X) Real Hyperbolic tangent of X DTANH(DX) Double precision Hyperbolic tangent of DX DPROD(X,V) Double precision Product of X and V DBLE(X) Double precision Convert X to double precision CMPLX(X) Complex X+Oi CMPLX(X,V) Complex X+Vi AIMAG(CX) Real Imaginary part of CX REAL(CX) Real Real part of CX CONJG(CX) Complex Conjugate of CX, a - bi LEN(CHX) Integer Length of character string CHX INDEX(CHX,CHV) Integer Position of substring CHV in string CHX CHAR(lX) Character string Character in the IXth position of collating sequence (Continued) FORTRAN77 IntrinsicFunctions I 539

5 Function Name Function Type Definition ICHAR(CHX) Integer Position of the character CHX in the collating sequence LGE(CHX,CHY) Logical Value of (CHX is lexically greater than or equal to CHY) LGT(CHX,CHY) Logical Value of (CHX is lexically greater than CHY) LLE(CHX,CHY) Logical Value of (CHX is lexically less than or equal to CHY) LLT(CHX,CHY) Logical Value of (CHX is lexically less than CHY)