STRUCTURED COBOL

A version of COBOL that permits structured programming was designed. It was implemented using a pre-processor that outputs standard COBOL. The pre-processor will indiscriminately run programs that are either structured or non-structured, or with very limited restrictions, programs with a mixture of both. A structured IF was included as a modification of the COBOL IF. In line looping was created with a redefinition of the PERFORM, maintaining all of its capabilities and adding a DO UNTIL. The PERFORM was also modified to allow a CASE construct. All new structures are completely nestable. © 1978.